diff --git a/.gitignore b/.gitignore
index 67d6286e..6159faaa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -300,3 +300,6 @@ vsts/build/bdist.win32/
 !azure-devops/azure/devops/released/release
 !azure-devops/azure/devops/v5_0/release
 !azure-devops/azure/devops/v5_1/release
+
+# ignore private folder for testing reported issues
+issues/
\ No newline at end of file
diff --git a/azure-devops/azure/devops/released/notification/notification_client.py b/azure-devops/azure/devops/released/notification/notification_client.py
index 2c833304..12a2656f 100644
--- a/azure-devops/azure/devops/released/notification/notification_client.py
+++ b/azure-devops/azure/devops/released/notification/notification_client.py
@@ -27,11 +27,11 @@ def __init__(self, base_url=None, creds=None):
 
     def list_logs(self, source, entry_id=None, start_time=None, end_time=None):
         """ListLogs.
-        List diagnostic logs this service.
-        :param str source:
-        :param str entry_id:
-        :param datetime start_time:
-        :param datetime end_time:
+        Get a list of diagnostic logs for this service.
+        :param str source: ID specifying which type of logs to check diagnostics for.
+        :param str entry_id: The ID of the specific log to query for.
+        :param datetime start_time: Start time for the time range to query in.
+        :param datetime end_time: End time for the time range to query in.
         :rtype: [INotificationDiagnosticLog]
         """
         route_values = {}
@@ -53,7 +53,8 @@ def list_logs(self, source, entry_id=None, start_time=None, end_time=None):
 
     def get_subscription_diagnostics(self, subscription_id):
         """GetSubscriptionDiagnostics.
-        :param str subscription_id:
+        Get the diagnostics settings for a subscription.
+        :param str subscription_id: The id of the notifications subscription.
         :rtype: :class:`<SubscriptionDiagnostics> <azure.devops.v5_1.notification.models.SubscriptionDiagnostics>`
         """
         route_values = {}
@@ -67,8 +68,9 @@ def get_subscription_diagnostics(self, subscription_id):
 
     def update_subscription_diagnostics(self, update_parameters, subscription_id):
         """UpdateSubscriptionDiagnostics.
+        Update the diagnostics settings for a subscription.
         :param :class:`<UpdateSubscripitonDiagnosticsParameters> <azure.devops.v5_1.notification.models.UpdateSubscripitonDiagnosticsParameters>` update_parameters:
-        :param str subscription_id:
+        :param str subscription_id: The id of the notifications subscription.
         :rtype: :class:`<SubscriptionDiagnostics> <azure.devops.v5_1.notification.models.SubscriptionDiagnostics>`
         """
         route_values = {}
@@ -85,7 +87,7 @@ def update_subscription_diagnostics(self, update_parameters, subscription_id):
     def get_event_type(self, event_type):
         """GetEventType.
         Get a specific event type.
-        :param str event_type:
+        :param str event_type: The ID of the event type.
         :rtype: :class:`<NotificationEventType> <azure.devops.v5_1.notification.models.NotificationEventType>`
         """
         route_values = {}
@@ -135,7 +137,8 @@ def update_settings(self, update_parameters):
 
     def get_subscriber(self, subscriber_id):
         """GetSubscriber.
-        :param str subscriber_id:
+        Get delivery preferences of a notifications subscriber.
+        :param str subscriber_id: ID of the user or group.
         :rtype: :class:`<NotificationSubscriber> <azure.devops.v5_1.notification.models.NotificationSubscriber>`
         """
         route_values = {}
@@ -149,8 +152,9 @@ def get_subscriber(self, subscriber_id):
 
     def update_subscriber(self, update_parameters, subscriber_id):
         """UpdateSubscriber.
+        Update delivery preferences of a notifications subscriber.
         :param :class:`<NotificationSubscriberUpdateParameters> <azure.devops.v5_1.notification.models.NotificationSubscriberUpdateParameters>` update_parameters:
-        :param str subscriber_id:
+        :param str subscriber_id: ID of the user or group.
         :rtype: :class:`<NotificationSubscriber> <azure.devops.v5_1.notification.models.NotificationSubscriber>`
         """
         route_values = {}
diff --git a/azure-devops/azure/devops/v5_0/cloud_load_test/models.py b/azure-devops/azure/devops/v5_0/cloud_load_test/models.py
index 0e3018d0..bd0f4b6f 100644
--- a/azure-devops/azure/devops/v5_0/cloud_load_test/models.py
+++ b/azure-devops/azure/devops/v5_0/cloud_load_test/models.py
@@ -1442,8 +1442,8 @@ class WebApiUserLoadTestMachineInput(WebApiLoadTestMachineInput):
     :type tenant_id: str
     :param user_load_agent_resources_uri:
     :type user_load_agent_resources_uri: str
-    :param vSTSAccount_uri:
-    :type vSTSAccount_uri: str
+    :param vsts_account_uri:
+    :type vsts_account_uri: str
     """
 
     _attribute_map = {
@@ -1454,15 +1454,15 @@ class WebApiUserLoadTestMachineInput(WebApiLoadTestMachineInput):
         'agent_group_name': {'key': 'agentGroupName', 'type': 'str'},
         'tenant_id': {'key': 'tenantId', 'type': 'str'},
         'user_load_agent_resources_uri': {'key': 'userLoadAgentResourcesUri', 'type': 'str'},
-        'vSTSAccount_uri': {'key': 'vSTSAccountUri', 'type': 'str'}
+        'vsts_account_uri': {'key': 'vstsAccountUri', 'type': 'str'}
     }
 
-    def __init__(self, machine_group_id=None, machine_type=None, setup_configuration=None, supported_run_types=None, agent_group_name=None, tenant_id=None, user_load_agent_resources_uri=None, vSTSAccount_uri=None):
+    def __init__(self, machine_group_id=None, machine_type=None, setup_configuration=None, supported_run_types=None, agent_group_name=None, tenant_id=None, user_load_agent_resources_uri=None, vsts_account_uri=None):
         super(WebApiUserLoadTestMachineInput, self).__init__(machine_group_id=machine_group_id, machine_type=machine_type, setup_configuration=setup_configuration, supported_run_types=supported_run_types)
         self.agent_group_name = agent_group_name
         self.tenant_id = tenant_id
         self.user_load_agent_resources_uri = user_load_agent_resources_uri
-        self.vSTSAccount_uri = vSTSAccount_uri
+        self.vsts_account_uri = vsts_account_uri
 
 
 class WebInstanceSummaryData(Model):
diff --git a/azure-devops/azure/devops/v5_0/gallery/models.py b/azure-devops/azure/devops/v5_0/gallery/models.py
index 16c1b8f9..76ea5f24 100644
--- a/azure-devops/azure/devops/v5_0/gallery/models.py
+++ b/azure-devops/azure/devops/v5_0/gallery/models.py
@@ -64,21 +64,21 @@ def __init__(self, default_operation=None, item_id=None, operations=None, target
 class Answers(Model):
     """Answers.
 
-    :param vSMarketplace_extension_name: Gets or sets the vs marketplace extension name
-    :type vSMarketplace_extension_name: str
-    :param vSMarketplace_publisher_name: Gets or sets the vs marketplace publsiher name
-    :type vSMarketplace_publisher_name: str
+    :param vs_marketplace_extension_name: Gets or sets the vs marketplace extension name
+    :type vs_marketplace_extension_name: str
+    :param vs_marketplace_publisher_name: Gets or sets the vs marketplace publsiher name
+    :type vs_marketplace_publisher_name: str
     """
 
     _attribute_map = {
-        'vSMarketplace_extension_name': {'key': 'vSMarketplaceExtensionName', 'type': 'str'},
-        'vSMarketplace_publisher_name': {'key': 'vSMarketplacePublisherName', 'type': 'str'}
+        'vs_marketplace_extension_name': {'key': 'vsMarketplaceExtensionName', 'type': 'str'},
+        'vs_marketplace_publisher_name': {'key': 'vsMarketplacePublisherName', 'type': 'str'}
     }
 
-    def __init__(self, vSMarketplace_extension_name=None, vSMarketplace_publisher_name=None):
+    def __init__(self, vs_marketplace_extension_name=None, vs_marketplace_publisher_name=None):
         super(Answers, self).__init__()
-        self.vSMarketplace_extension_name = vSMarketplace_extension_name
-        self.vSMarketplace_publisher_name = vSMarketplace_publisher_name
+        self.vs_marketplace_extension_name = vs_marketplace_extension_name
+        self.vs_marketplace_publisher_name = vs_marketplace_publisher_name
 
 
 class AssetDetails(Model):
diff --git a/azure-devops/azure/devops/v5_0/notification/notification_client.py b/azure-devops/azure/devops/v5_0/notification/notification_client.py
index a2b7ac39..948f2b5c 100644
--- a/azure-devops/azure/devops/v5_0/notification/notification_client.py
+++ b/azure-devops/azure/devops/v5_0/notification/notification_client.py
@@ -244,9 +244,9 @@ def get_subscription(self, subscription_id, query_flags=None):
 
     def list_subscriptions(self, target_id=None, ids=None, query_flags=None):
         """ListSubscriptions.
-        [Preview API]
-        :param str target_id:
-        :param [str] ids:
+        [Preview API] Get a list of notification subscriptions, either by subscription IDs or by all subscriptions for a given user or group.
+        :param str target_id: User or Group ID
+        :param [str] ids: List of subscription IDs
         :param str query_flags:
         :rtype: [NotificationSubscription]
         """
diff --git a/azure-devops/azure/devops/v5_0/profile/models.py b/azure-devops/azure/devops/v5_0/profile/models.py
index f7e6dedb..207fa0d5 100644
--- a/azure-devops/azure/devops/v5_0/profile/models.py
+++ b/azure-devops/azure/devops/v5_0/profile/models.py
@@ -84,8 +84,8 @@ def __init__(self, is_auto_generated=None, size=None, time_stamp=None, value=Non
 class CreateProfileContext(Model):
     """CreateProfileContext.
 
-    :param cIData:
-    :type cIData: dict
+    :param ci_data:
+    :type ci_data: dict
     :param contact_with_offers:
     :type contact_with_offers: bool
     :param country_name:
@@ -105,7 +105,7 @@ class CreateProfileContext(Model):
     """
 
     _attribute_map = {
-        'cIData': {'key': 'cIData', 'type': '{object}'},
+        'ci_data': {'key': 'ciData', 'type': '{object}'},
         'contact_with_offers': {'key': 'contactWithOffers', 'type': 'bool'},
         'country_name': {'key': 'countryName', 'type': 'str'},
         'display_name': {'key': 'displayName', 'type': 'str'},
@@ -116,9 +116,9 @@ class CreateProfileContext(Model):
         'profile_state': {'key': 'profileState', 'type': 'object'}
     }
 
-    def __init__(self, cIData=None, contact_with_offers=None, country_name=None, display_name=None, email_address=None, has_account=None, language=None, phone_number=None, profile_state=None):
+    def __init__(self, ci_data=None, contact_with_offers=None, country_name=None, display_name=None, email_address=None, has_account=None, language=None, phone_number=None, profile_state=None):
         super(CreateProfileContext, self).__init__()
-        self.cIData = cIData
+        self.ci_data = ci_data
         self.contact_with_offers = contact_with_offers
         self.country_name = country_name
         self.display_name = display_name
diff --git a/azure-devops/azure/devops/v5_0/release/models.py b/azure-devops/azure/devops/v5_0/release/models.py
index 686f1a10..bac173d7 100644
--- a/azure-devops/azure/devops/v5_0/release/models.py
+++ b/azure-devops/azure/devops/v5_0/release/models.py
@@ -1430,8 +1430,8 @@ class MailMessage(Model):
 
     :param body:
     :type body: str
-    :param cC:
-    :type cC: :class:`EmailRecipients <azure.devops.v5_0.release.models.EmailRecipients>`
+    :param cc:
+    :type cc: :class:`EmailRecipients <azure.devops.v5_0.release.models.EmailRecipients>`
     :param in_reply_to:
     :type in_reply_to: str
     :param message_id:
@@ -1452,7 +1452,7 @@ class MailMessage(Model):
 
     _attribute_map = {
         'body': {'key': 'body', 'type': 'str'},
-        'cC': {'key': 'cC', 'type': 'EmailRecipients'},
+        'cc': {'key': 'cc', 'type': 'EmailRecipients'},
         'in_reply_to': {'key': 'inReplyTo', 'type': 'str'},
         'message_id': {'key': 'messageId', 'type': 'str'},
         'reply_by': {'key': 'replyBy', 'type': 'iso-8601'},
@@ -1463,10 +1463,10 @@ class MailMessage(Model):
         'to': {'key': 'to', 'type': 'EmailRecipients'}
     }
 
-    def __init__(self, body=None, cC=None, in_reply_to=None, message_id=None, reply_by=None, reply_to=None, sections=None, sender_type=None, subject=None, to=None):
+    def __init__(self, body=None, cc=None, in_reply_to=None, message_id=None, reply_by=None, reply_to=None, sections=None, sender_type=None, subject=None, to=None):
         super(MailMessage, self).__init__()
         self.body = body
-        self.cC = cC
+        self.cc = cc
         self.in_reply_to = in_reply_to
         self.message_id = message_id
         self.reply_by = reply_by
diff --git a/azure-devops/azure/devops/v5_0/task_agent/models.py b/azure-devops/azure/devops/v5_0/task_agent/models.py
index d1435154..bddceb8b 100644
--- a/azure-devops/azure/devops/v5_0/task_agent/models.py
+++ b/azure-devops/azure/devops/v5_0/task_agent/models.py
@@ -2142,8 +2142,8 @@ class TaskAgentMessage(Model):
 
     :param body: Gets or sets the body of the message. If the <c>IV</c> property is provided the body will need to be decrypted using the <c>TaskAgentSession.EncryptionKey</c> value in addition to the <c>IV</c>.
     :type body: str
-    :param iV: Gets or sets the intialization vector used to encrypt this message.
-    :type iV: str
+    :param iv: Gets or sets the intialization vector used to encrypt this message.
+    :type iv: str
     :param message_id: Gets or sets the message identifier.
     :type message_id: long
     :param message_type: Gets or sets the message type, describing the data contract found in <c>TaskAgentMessage.Body</c>.
@@ -2152,15 +2152,15 @@ class TaskAgentMessage(Model):
 
     _attribute_map = {
         'body': {'key': 'body', 'type': 'str'},
-        'iV': {'key': 'iV', 'type': 'str'},
+        'iv': {'key': 'iv', 'type': 'str'},
         'message_id': {'key': 'messageId', 'type': 'long'},
         'message_type': {'key': 'messageType', 'type': 'str'}
     }
 
-    def __init__(self, body=None, iV=None, message_id=None, message_type=None):
+    def __init__(self, body=None, iv=None, message_id=None, message_type=None):
         super(TaskAgentMessage, self).__init__()
         self.body = body
-        self.iV = iV
+        self.iv = iv
         self.message_id = message_id
         self.message_type = message_type
 
@@ -2466,8 +2466,8 @@ class TaskAgentReference(Model):
     :type id: int
     :param name: Gets the name of the agent.
     :type name: str
-    :param oSDescription: Gets the OS of the agent.
-    :type oSDescription: str
+    :param os_description: Gets the OS of the agent.
+    :type os_description: str
     :param provisioning_state: Gets or sets the current provisioning state of this agent
     :type provisioning_state: str
     :param status: Gets the current connectivity status of the agent.
@@ -2482,20 +2482,20 @@ class TaskAgentReference(Model):
         'enabled': {'key': 'enabled', 'type': 'bool'},
         'id': {'key': 'id', 'type': 'int'},
         'name': {'key': 'name', 'type': 'str'},
-        'oSDescription': {'key': 'oSDescription', 'type': 'str'},
+        'os_description': {'key': 'osDescription', 'type': 'str'},
         'provisioning_state': {'key': 'provisioningState', 'type': 'str'},
         'status': {'key': 'status', 'type': 'object'},
         'version': {'key': 'version', 'type': 'str'}
     }
 
-    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, oSDescription=None, provisioning_state=None, status=None, version=None):
+    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, os_description=None, provisioning_state=None, status=None, version=None):
         super(TaskAgentReference, self).__init__()
         self._links = _links
         self.access_point = access_point
         self.enabled = enabled
         self.id = id
         self.name = name
-        self.oSDescription = oSDescription
+        self.os_description = os_description
         self.provisioning_state = provisioning_state
         self.status = status
         self.version = version
@@ -3897,8 +3897,8 @@ class TaskAgent(TaskAgentReference):
     :type id: int
     :param name: Gets the name of the agent.
     :type name: str
-    :param oSDescription: Gets the OS of the agent.
-    :type oSDescription: str
+    :param os_description: Gets the OS of the agent.
+    :type os_description: str
     :param provisioning_state: Gets or sets the current provisioning state of this agent
     :type provisioning_state: str
     :param status: Gets the current connectivity status of the agent.
@@ -3935,7 +3935,7 @@ class TaskAgent(TaskAgentReference):
         'enabled': {'key': 'enabled', 'type': 'bool'},
         'id': {'key': 'id', 'type': 'int'},
         'name': {'key': 'name', 'type': 'str'},
-        'oSDescription': {'key': 'oSDescription', 'type': 'str'},
+        'os_description': {'key': 'osDescription', 'type': 'str'},
         'provisioning_state': {'key': 'provisioningState', 'type': 'str'},
         'status': {'key': 'status', 'type': 'object'},
         'version': {'key': 'version', 'type': 'str'},
@@ -3952,8 +3952,8 @@ class TaskAgent(TaskAgentReference):
         'user_capabilities': {'key': 'userCapabilities', 'type': '{str}'}
     }
 
-    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, oSDescription=None, provisioning_state=None, status=None, version=None, assigned_agent_cloud_request=None, assigned_request=None, authorization=None, created_on=None, last_completed_request=None, max_parallelism=None, pending_update=None, properties=None, status_changed_on=None, system_capabilities=None, user_capabilities=None):
-        super(TaskAgent, self).__init__(_links=_links, access_point=access_point, enabled=enabled, id=id, name=name, oSDescription=oSDescription, provisioning_state=provisioning_state, status=status, version=version)
+    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, os_description=None, provisioning_state=None, status=None, version=None, assigned_agent_cloud_request=None, assigned_request=None, authorization=None, created_on=None, last_completed_request=None, max_parallelism=None, pending_update=None, properties=None, status_changed_on=None, system_capabilities=None, user_capabilities=None):
+        super(TaskAgent, self).__init__(_links=_links, access_point=access_point, enabled=enabled, id=id, name=name, os_description=os_description, provisioning_state=provisioning_state, status=status, version=version)
         self.assigned_agent_cloud_request = assigned_agent_cloud_request
         self.assigned_request = assigned_request
         self.authorization = authorization
diff --git a/azure-devops/azure/devops/v5_0/tfvc/models.py b/azure-devops/azure/devops/v5_0/tfvc/models.py
index 6ccc9ded..f7857e79 100644
--- a/azure-devops/azure/devops/v5_0/tfvc/models.py
+++ b/azure-devops/azure/devops/v5_0/tfvc/models.py
@@ -530,11 +530,11 @@ class TfvcChangesetRef(Model):
 
     :param _links: A collection of REST reference links.
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
-    :param author: Alias or display name of user
+    :param author: Alias or display name of user.
     :type author: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
-    :param changeset_id: Id of the changeset.
+    :param changeset_id: Changeset Id.
     :type changeset_id: int
-    :param checked_in_by: Alias or display name of user
+    :param checked_in_by: Alias or display name of user.
     :type checked_in_by: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
     :param comment: Comment for the changeset.
     :type comment: str
@@ -572,23 +572,23 @@ def __init__(self, _links=None, author=None, changeset_id=None, checked_in_by=No
 class TfvcChangesetSearchCriteria(Model):
     """TfvcChangesetSearchCriteria.
 
-    :param author: Alias or display name of user who made the changes
+    :param author: Alias or display name of user who made the changes.
     :type author: str
-    :param follow_renames: Whether or not to follow renames for the given item being queried
+    :param follow_renames: Whether or not to follow renames for the given item being queried.
     :type follow_renames: bool
-    :param from_date: If provided, only include changesets created after this date (string) Think of a better name for this.
+    :param from_date: If provided, only include changesets created after this date (string).
     :type from_date: str
-    :param from_id: If provided, only include changesets after this changesetID
+    :param from_id: If provided, only include changesets after this changesetID.
     :type from_id: int
-    :param include_links: Whether to include the _links field on the shallow references
+    :param include_links: Whether to include the _links field on the shallow references.
     :type include_links: bool
-    :param item_path: Path of item to search under
+    :param item_path: Path of item to search under.
     :type item_path: str
     :param mappings:
     :type mappings: list of :class:`TfvcMappingFilter <azure.devops.v5_0.tfvc.models.TfvcMappingFilter>`
-    :param to_date: If provided, only include changesets created before this date (string) Think of a better name for this.
+    :param to_date: If provided, only include changesets created before this date (string).
     :type to_date: str
-    :param to_id: If provided, a version descriptor for the latest change list to include
+    :param to_id: If provided, a version descriptor for the latest change list to include.
     :type to_id: int
     """
 
@@ -622,7 +622,7 @@ class TfvcChangesetsRequestData(Model):
 
     :param changeset_ids: List of changeset Ids.
     :type changeset_ids: list of int
-    :param comment_length: Length of the comment.
+    :param comment_length: Max length of the comment.
     :type comment_length: int
     :param include_links: Whether to include the _links field on the shallow references
     :type include_links: bool
@@ -658,21 +658,21 @@ class TfvcItem(ItemModel):
     :type path: str
     :param url:
     :type url: str
-    :param change_date:
+    :param change_date: Item changed datetime.
     :type change_date: datetime
-    :param deletion_id:
+    :param deletion_id: Greater than 0 if item is deleted.
     :type deletion_id: int
     :param encoding: File encoding from database, -1 represents binary.
     :type encoding: int
     :param hash_value: MD5 hash as a base 64 string, applies to files only.
     :type hash_value: str
-    :param is_branch:
+    :param is_branch: True if item is a branch.
     :type is_branch: bool
-    :param is_pending_change:
+    :param is_pending_change: True if there is a change pending.
     :type is_pending_change: bool
     :param size: The size of the file, if applicable.
     :type size: long
-    :param version:
+    :param version: Changeset version Id.
     :type version: int
     """
 
@@ -709,15 +709,15 @@ def __init__(self, _links=None, content=None, content_metadata=None, is_folder=N
 class TfvcItemDescriptor(Model):
     """TfvcItemDescriptor.
 
-    :param path:
+    :param path: Item path.
     :type path: str
-    :param recursion_level:
+    :param recursion_level: Defaults to OneLevel.
     :type recursion_level: object
-    :param version:
+    :param version: Specify the desired version, can be null or empty string only if VersionType is latest or tip.
     :type version: str
-    :param version_option:
+    :param version_option: Defaults to None.
     :type version_option: object
-    :param version_type:
+    :param version_type: Defaults to Latest.
     :type version_type: object
     """
 
@@ -765,21 +765,21 @@ def __init__(self, include_content_metadata=None, include_links=None, item_descr
 class TfvcLabelRef(Model):
     """TfvcLabelRef.
 
-    :param _links:
+    :param _links: Collection of reference links.
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
-    :param description:
+    :param description: Label description.
     :type description: str
-    :param id:
+    :param id: Label Id.
     :type id: int
-    :param label_scope:
+    :param label_scope: Label scope.
     :type label_scope: str
-    :param modified_date:
+    :param modified_date: Last modified datetime for the label.
     :type modified_date: datetime
-    :param name:
+    :param name: Label name.
     :type name: str
-    :param owner:
+    :param owner: Label owner.
     :type owner: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
-    :param url:
+    :param url: Label Url.
     :type url: str
     """
 
@@ -845,9 +845,9 @@ def __init__(self, include_links=None, item_label_filter=None, label_scope=None,
 class TfvcMappingFilter(Model):
     """TfvcMappingFilter.
 
-    :param exclude:
+    :param exclude: True if ServerPath should be excluded.
     :type exclude: bool
-    :param server_path:
+    :param server_path: Path to be included or excluded.
     :type server_path: str
     """
 
@@ -867,11 +867,11 @@ class TfvcMergeSource(Model):
 
     :param is_rename: Indicates if this a rename source. If false, it is a merge source.
     :type is_rename: bool
-    :param server_item: The server item of the merge source
+    :param server_item: The server item of the merge source.
     :type server_item: str
-    :param version_from: Start of the version range
+    :param version_from: Start of the version range.
     :type version_from: int
-    :param version_to: End of the version range
+    :param version_to: End of the version range.
     :type version_to: int
     """
 
@@ -893,9 +893,9 @@ def __init__(self, is_rename=None, server_item=None, version_from=None, version_
 class TfvcPolicyFailureInfo(Model):
     """TfvcPolicyFailureInfo.
 
-    :param message:
+    :param message: Policy failure message.
     :type message: str
-    :param policy_name:
+    :param policy_name: Name of the policy that failed.
     :type policy_name: str
     """
 
@@ -913,9 +913,9 @@ def __init__(self, message=None, policy_name=None):
 class TfvcPolicyOverrideInfo(Model):
     """TfvcPolicyOverrideInfo.
 
-    :param comment:
+    :param comment: Overidden policy comment.
     :type comment: str
-    :param policy_failures:
+    :param policy_failures: Information on the failed policy that was overridden.
     :type policy_failures: list of :class:`TfvcPolicyFailureInfo <azure.devops.v5_0.tfvc.models.TfvcPolicyFailureInfo>`
     """
 
@@ -949,21 +949,21 @@ def __init__(self, path=None):
 class TfvcShelvesetRef(Model):
     """TfvcShelvesetRef.
 
-    :param _links:
+    :param _links: List of reference links for the shelveset.
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
-    :param comment:
+    :param comment: Shelveset comment.
     :type comment: str
-    :param comment_truncated:
+    :param comment_truncated: Shelveset comment truncated as applicable.
     :type comment_truncated: bool
-    :param created_date:
+    :param created_date: Shelveset create date.
     :type created_date: datetime
-    :param id:
+    :param id: Shelveset Id.
     :type id: str
-    :param name:
+    :param name: Shelveset name.
     :type name: str
-    :param owner:
+    :param owner: Shelveset Owner.
     :type owner: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
-    :param url:
+    :param url: Shelveset Url.
     :type url: str
     """
 
@@ -1003,7 +1003,7 @@ class TfvcShelvesetRequestData(Model):
     :type max_change_count: int
     :param max_comment_length: Max length of comment
     :type max_comment_length: int
-    :param name: Shelveset's name
+    :param name: Shelveset name
     :type name: str
     :param owner: Owner's ID. Could be a name or a guid.
     :type owner: str
@@ -1053,7 +1053,7 @@ def __init__(self, changeset_id=None, file_count_total=None):
 class TfvcVersionDescriptor(Model):
     """TfvcVersionDescriptor.
 
-    :param version:
+    :param version: Version object.
     :type version: str
     :param version_option:
     :type version_option: object
@@ -1135,7 +1135,7 @@ class TfvcBranchRef(TfvcShallowBranchRef):
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
     :param created_date: Creation date of the branch.
     :type created_date: datetime
-    :param description: Description of the branch.
+    :param description: Branch description.
     :type description: str
     :param is_deleted: Is the branch deleted?
     :type is_deleted: bool
@@ -1170,11 +1170,11 @@ class TfvcChangeset(TfvcChangesetRef):
 
     :param _links: A collection of REST reference links.
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
-    :param author: Alias or display name of user
+    :param author: Alias or display name of user.
     :type author: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
-    :param changeset_id: Id of the changeset.
+    :param changeset_id: Changeset Id.
     :type changeset_id: int
-    :param checked_in_by: Alias or display name of user
+    :param checked_in_by: Alias or display name of user.
     :type checked_in_by: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
     :param comment: Comment for the changeset.
     :type comment: str
@@ -1184,15 +1184,15 @@ class TfvcChangeset(TfvcChangesetRef):
     :type created_date: datetime
     :param url: URL to retrieve the item.
     :type url: str
-    :param account_id: Account Id of the changeset.
+    :param account_id: Changeset Account Id also known as Organization Id.
     :type account_id: str
     :param changes: List of associated changes.
     :type changes: list of :class:`TfvcChange <azure.devops.v5_0.tfvc.models.TfvcChange>`
-    :param checkin_notes: Checkin Notes for the changeset.
+    :param checkin_notes: List of Checkin Notes for the changeset.
     :type checkin_notes: list of :class:`CheckinNote <azure.devops.v5_0.tfvc.models.CheckinNote>`
-    :param collection_id: Collection Id of the changeset.
+    :param collection_id: Changeset collection Id.
     :type collection_id: str
-    :param has_more_changes: Are more changes available.
+    :param has_more_changes: True if more changes are available.
     :type has_more_changes: bool
     :param policy_override: Policy Override for the changeset.
     :type policy_override: :class:`TfvcPolicyOverrideInfo <azure.devops.v5_0.tfvc.models.TfvcPolicyOverrideInfo>`
@@ -1236,23 +1236,23 @@ def __init__(self, _links=None, author=None, changeset_id=None, checked_in_by=No
 class TfvcLabel(TfvcLabelRef):
     """TfvcLabel.
 
-    :param _links:
+    :param _links: Collection of reference links.
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
-    :param description:
+    :param description: Label description.
     :type description: str
-    :param id:
+    :param id: Label Id.
     :type id: int
-    :param label_scope:
+    :param label_scope: Label scope.
     :type label_scope: str
-    :param modified_date:
+    :param modified_date: Last modified datetime for the label.
     :type modified_date: datetime
-    :param name:
+    :param name: Label name.
     :type name: str
-    :param owner:
+    :param owner: Label owner.
     :type owner: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
-    :param url:
+    :param url: Label Url.
     :type url: str
-    :param items:
+    :param items: List of items.
     :type items: list of :class:`TfvcItem <azure.devops.v5_0.tfvc.models.TfvcItem>`
     """
 
@@ -1276,29 +1276,29 @@ def __init__(self, _links=None, description=None, id=None, label_scope=None, mod
 class TfvcShelveset(TfvcShelvesetRef):
     """TfvcShelveset.
 
-    :param _links:
+    :param _links: List of reference links for the shelveset.
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
-    :param comment:
+    :param comment: Shelveset comment.
     :type comment: str
-    :param comment_truncated:
+    :param comment_truncated: Shelveset comment truncated as applicable.
     :type comment_truncated: bool
-    :param created_date:
+    :param created_date: Shelveset create date.
     :type created_date: datetime
-    :param id:
+    :param id: Shelveset Id.
     :type id: str
-    :param name:
+    :param name: Shelveset name.
     :type name: str
-    :param owner:
+    :param owner: Shelveset Owner.
     :type owner: :class:`IdentityRef <azure.devops.v5_0.tfvc.models.IdentityRef>`
-    :param url:
+    :param url: Shelveset Url.
     :type url: str
-    :param changes:
+    :param changes: List of changes.
     :type changes: list of :class:`TfvcChange <azure.devops.v5_0.tfvc.models.TfvcChange>`
-    :param notes:
+    :param notes: List of checkin notes.
     :type notes: list of :class:`CheckinNote <azure.devops.v5_0.tfvc.models.CheckinNote>`
-    :param policy_override:
+    :param policy_override: Policy override information if applicable.
     :type policy_override: :class:`TfvcPolicyOverrideInfo <azure.devops.v5_0.tfvc.models.TfvcPolicyOverrideInfo>`
-    :param work_items:
+    :param work_items: List of associated workitems.
     :type work_items: list of :class:`AssociatedWorkItem <azure.devops.v5_0.tfvc.models.AssociatedWorkItem>`
     """
 
@@ -1334,7 +1334,7 @@ class TfvcBranch(TfvcBranchRef):
     :type _links: :class:`ReferenceLinks <azure.devops.v5_0.tfvc.models.ReferenceLinks>`
     :param created_date: Creation date of the branch.
     :type created_date: datetime
-    :param description: Description of the branch.
+    :param description: Branch description.
     :type description: str
     :param is_deleted: Is the branch deleted?
     :type is_deleted: bool
diff --git a/azure-devops/azure/devops/v5_0/tfvc/tfvc_client.py b/azure-devops/azure/devops/v5_0/tfvc/tfvc_client.py
index d8533d89..ca140898 100644
--- a/azure-devops/azure/devops/v5_0/tfvc/tfvc_client.py
+++ b/azure-devops/azure/devops/v5_0/tfvc/tfvc_client.py
@@ -276,7 +276,7 @@ def get_batched_changesets(self, changesets_request_data):
     def get_changeset_work_items(self, id=None):
         """GetChangesetWorkItems.
         Retrieves the work items associated with a particular changeset.
-        :param int id: ID of the changeset. Default: null
+        :param int id: ID of the changeset.
         :rtype: [AssociatedWorkItem]
         """
         route_values = {}
diff --git a/azure-devops/azure/devops/v5_1/audit/models.py b/azure-devops/azure/devops/v5_1/audit/models.py
index d22c7070..ade0abcb 100644
--- a/azure-devops/azure/devops/v5_1/audit/models.py
+++ b/azure-devops/azure/devops/v5_1/audit/models.py
@@ -27,8 +27,8 @@ class AuditLogEntry(Model):
     :type data: dict
     :param id: EventId, should be unique
     :type id: str
-    :param iPAddress: IP Address where the event was originated
-    :type iPAddress: str
+    :param ip_address: IP Address where the event was originated
+    :type ip_address: str
     :param scope_id: The org, collection or project Id
     :type scope_id: str
     :param scope_type: The type of the scope, Enterprise, Organization or Project
@@ -48,14 +48,14 @@ class AuditLogEntry(Model):
         'correlation_id': {'key': 'correlationId', 'type': 'str'},
         'data': {'key': 'data', 'type': '{object}'},
         'id': {'key': 'id', 'type': 'str'},
-        'iPAddress': {'key': 'ipAddress', 'type': 'str'},
+        'ip_address': {'key': 'ipAddress', 'type': 'str'},
         'scope_id': {'key': 'scopeId', 'type': 'str'},
         'scope_type': {'key': 'scopeType', 'type': 'object'},
         'timestamp': {'key': 'timestamp', 'type': 'iso-8601'},
         'user_agent': {'key': 'userAgent', 'type': 'str'}
     }
 
-    def __init__(self, action_id=None, activity_id=None, actor_cUID=None, actor_user_id=None, authentication_mechanism=None, correlation_id=None, data=None, id=None, iPAddress=None, scope_id=None, scope_type=None, timestamp=None, user_agent=None):
+    def __init__(self, action_id=None, activity_id=None, actor_cUID=None, actor_user_id=None, authentication_mechanism=None, correlation_id=None, data=None, id=None, ip_address=None, scope_id=None, scope_type=None, timestamp=None, user_agent=None):
         super(AuditLogEntry, self).__init__()
         self.action_id = action_id
         self.activity_id = activity_id
@@ -65,7 +65,7 @@ def __init__(self, action_id=None, activity_id=None, actor_cUID=None, actor_user
         self.correlation_id = correlation_id
         self.data = data
         self.id = id
-        self.iPAddress = iPAddress
+        self.ip_address = ip_address
         self.scope_id = scope_id
         self.scope_type = scope_type
         self.timestamp = timestamp
diff --git a/azure-devops/azure/devops/v5_1/cloud_load_test/models.py b/azure-devops/azure/devops/v5_1/cloud_load_test/models.py
index 5f995ee1..1c6a8850 100644
--- a/azure-devops/azure/devops/v5_1/cloud_load_test/models.py
+++ b/azure-devops/azure/devops/v5_1/cloud_load_test/models.py
@@ -1503,8 +1503,8 @@ class WebApiUserLoadTestMachineInput(WebApiLoadTestMachineInput):
     :type tenant_id: str
     :param user_load_agent_resources_uri:
     :type user_load_agent_resources_uri: str
-    :param vSTSAccount_uri:
-    :type vSTSAccount_uri: str
+    :param vsts_account_uri:
+    :type vsts_account_uri: str
     """
 
     _attribute_map = {
@@ -1515,15 +1515,15 @@ class WebApiUserLoadTestMachineInput(WebApiLoadTestMachineInput):
         'agent_group_name': {'key': 'agentGroupName', 'type': 'str'},
         'tenant_id': {'key': 'tenantId', 'type': 'str'},
         'user_load_agent_resources_uri': {'key': 'userLoadAgentResourcesUri', 'type': 'str'},
-        'vSTSAccount_uri': {'key': 'vstsAccountUri', 'type': 'str'}
+        'vsts_account_uri': {'key': 'vstsAccountUri', 'type': 'str'}
     }
 
-    def __init__(self, machine_group_id=None, machine_type=None, setup_configuration=None, supported_run_types=None, agent_group_name=None, tenant_id=None, user_load_agent_resources_uri=None, vSTSAccount_uri=None):
+    def __init__(self, machine_group_id=None, machine_type=None, setup_configuration=None, supported_run_types=None, agent_group_name=None, tenant_id=None, user_load_agent_resources_uri=None, vsts_account_uri=None):
         super(WebApiUserLoadTestMachineInput, self).__init__(machine_group_id=machine_group_id, machine_type=machine_type, setup_configuration=setup_configuration, supported_run_types=supported_run_types)
         self.agent_group_name = agent_group_name
         self.tenant_id = tenant_id
         self.user_load_agent_resources_uri = user_load_agent_resources_uri
-        self.vSTSAccount_uri = vSTSAccount_uri
+        self.vsts_account_uri = vsts_account_uri
 
 
 class WebInstanceSummaryData(Model):
diff --git a/azure-devops/azure/devops/v5_1/gallery/models.py b/azure-devops/azure/devops/v5_1/gallery/models.py
index 7838adbd..fc295337 100644
--- a/azure-devops/azure/devops/v5_1/gallery/models.py
+++ b/azure-devops/azure/devops/v5_1/gallery/models.py
@@ -63,21 +63,21 @@ def __init__(self, default_operation=None, item_id=None, operations=None, target
 
 class Answers(Model):
     """
-    :param vSMarketplace_extension_name: Gets or sets the vs marketplace extension name
-    :type vSMarketplace_extension_name: str
-    :param vSMarketplace_publisher_name: Gets or sets the vs marketplace publisher name
-    :type vSMarketplace_publisher_name: str
+    :param vs_marketplace_extension_name: Gets or sets the vs marketplace extension name
+    :type vs_marketplace_extension_name: str
+    :param vs_marketplace_publisher_name: Gets or sets the vs marketplace publisher name
+    :type vs_marketplace_publisher_name: str
     """
 
     _attribute_map = {
-        'vSMarketplace_extension_name': {'key': 'vsMarketplaceExtensionName', 'type': 'str'},
-        'vSMarketplace_publisher_name': {'key': 'vsMarketplacePublisherName', 'type': 'str'}
+        'vs_marketplace_extension_name': {'key': 'vsMarketplaceExtensionName', 'type': 'str'},
+        'vs_marketplace_publisher_name': {'key': 'vsMarketplacePublisherName', 'type': 'str'}
     }
 
-    def __init__(self, vSMarketplace_extension_name=None, vSMarketplace_publisher_name=None):
+    def __init__(self, vs_marketplace_extension_name=None, vs_marketplace_publisher_name=None):
         super(Answers, self).__init__()
-        self.vSMarketplace_extension_name = vSMarketplace_extension_name
-        self.vSMarketplace_publisher_name = vSMarketplace_publisher_name
+        self.vs_marketplace_extension_name = vs_marketplace_extension_name
+        self.vs_marketplace_publisher_name = vs_marketplace_publisher_name
 
 
 class AssetDetails(Model):
diff --git a/azure-devops/azure/devops/v5_1/notification/models.py b/azure-devops/azure/devops/v5_1/notification/models.py
index 7269fc5b..0ca4a236 100644
--- a/azure-devops/azure/devops/v5_1/notification/models.py
+++ b/azure-devops/azure/devops/v5_1/notification/models.py
@@ -335,23 +335,23 @@ class INotificationDiagnosticLog(Model):
     """
     Abstraction interface for the diagnostic log.  Primarily for deserialization.
 
-    :param activity_id:
+    :param activity_id: Identifier used for correlating to other diagnostics that may have been recorded elsewhere.
     :type activity_id: str
-    :param description:
+    :param description: Description of what subscription or notification job is being logged.
     :type description: str
-    :param end_time:
+    :param end_time: Time the log ended.
     :type end_time: datetime
-    :param id:
+    :param id: Unique instance identifier.
     :type id: str
-    :param log_type:
+    :param log_type: Type of information being logged.
     :type log_type: str
-    :param messages:
+    :param messages: List of log messages.
     :type messages: list of :class:`NotificationDiagnosticLogMessage <azure.devops.v5_1.notification.models.NotificationDiagnosticLogMessage>`
-    :param properties:
+    :param properties: Dictionary of log properties and settings for the job.
     :type properties: dict
-    :param source:
+    :param source: This identifier depends on the logType.  For notification jobs, this will be the job Id. For subscription tracing, this will be a special root Guid with the subscription Id encoded.
     :type source: str
-    :param start_time:
+    :param start_time: Time the log started.
     :type start_time: datetime
     """
 
@@ -1260,11 +1260,13 @@ def __init__(self, address=None, type=None, use_custom_address=None):
 
 class SubscriptionDiagnostics(Model):
     """
-    :param delivery_results:
+    Contains all the diagonstics settings for a subscription.
+
+    :param delivery_results: Diagnostics settings for retaining delivery results.  Used for Service Hooks subscriptions.
     :type delivery_results: :class:`SubscriptionTracing <azure.devops.v5_1.notification.models.SubscriptionTracing>`
-    :param delivery_tracing:
+    :param delivery_tracing: Diagnostics settings for troubleshooting notification delivery.
     :type delivery_tracing: :class:`SubscriptionTracing <azure.devops.v5_1.notification.models.SubscriptionTracing>`
-    :param evaluation_tracing:
+    :param evaluation_tracing: Diagnostics settings for troubleshooting event matching.
     :type evaluation_tracing: :class:`SubscriptionTracing <azure.devops.v5_1.notification.models.SubscriptionTracing>`
     """
 
@@ -1459,7 +1461,9 @@ def __init__(self, id=None, name=None, type=None):
 
 class SubscriptionTracing(Model):
     """
-    :param enabled:
+    Data controlling a single diagnostic setting for a subscription.
+
+    :param enabled: Indicates whether the diagnostic tracing is enabled or not.
     :type enabled: bool
     :param end_date: Trace until the specified end date.
     :type end_date: datetime
@@ -1507,11 +1511,13 @@ def __init__(self, opted_out=None):
 
 class UpdateSubscripitonDiagnosticsParameters(Model):
     """
-    :param delivery_results:
+    Parameters to update diagnostics settings for a subscription.
+
+    :param delivery_results: Diagnostics settings for retaining delivery results.  Used for Service Hooks subscriptions.
     :type delivery_results: :class:`UpdateSubscripitonTracingParameters <azure.devops.v5_1.notification.models.UpdateSubscripitonTracingParameters>`
-    :param delivery_tracing:
+    :param delivery_tracing: Diagnostics settings for troubleshooting notification delivery.
     :type delivery_tracing: :class:`UpdateSubscripitonTracingParameters <azure.devops.v5_1.notification.models.UpdateSubscripitonTracingParameters>`
-    :param evaluation_tracing:
+    :param evaluation_tracing: Diagnostics settings for troubleshooting event matching.
     :type evaluation_tracing: :class:`UpdateSubscripitonTracingParameters <azure.devops.v5_1.notification.models.UpdateSubscripitonTracingParameters>`
     """
 
@@ -1530,7 +1536,9 @@ def __init__(self, delivery_results=None, delivery_tracing=None, evaluation_trac
 
 class UpdateSubscripitonTracingParameters(Model):
     """
-    :param enabled:
+    Parameters to update a specific diagnostic setting.
+
+    :param enabled: Indicates whether to enable to disable the diagnostic tracing.
     :type enabled: bool
     """
 
diff --git a/azure-devops/azure/devops/v5_1/notification/notification_client.py b/azure-devops/azure/devops/v5_1/notification/notification_client.py
index 79432865..e36ca701 100644
--- a/azure-devops/azure/devops/v5_1/notification/notification_client.py
+++ b/azure-devops/azure/devops/v5_1/notification/notification_client.py
@@ -27,11 +27,11 @@ def __init__(self, base_url=None, creds=None):
 
     def list_logs(self, source, entry_id=None, start_time=None, end_time=None):
         """ListLogs.
-        List diagnostic logs this service.
-        :param str source:
-        :param str entry_id:
-        :param datetime start_time:
-        :param datetime end_time:
+        Get a list of diagnostic logs for this service.
+        :param str source: ID specifying which type of logs to check diagnostics for.
+        :param str entry_id: The ID of the specific log to query for.
+        :param datetime start_time: Start time for the time range to query in.
+        :param datetime end_time: End time for the time range to query in.
         :rtype: [INotificationDiagnosticLog]
         """
         route_values = {}
@@ -53,7 +53,8 @@ def list_logs(self, source, entry_id=None, start_time=None, end_time=None):
 
     def get_subscription_diagnostics(self, subscription_id):
         """GetSubscriptionDiagnostics.
-        :param str subscription_id:
+        Get the diagnostics settings for a subscription.
+        :param str subscription_id: The id of the notifications subscription.
         :rtype: :class:`<SubscriptionDiagnostics> <azure.devops.v5_1.notification.models.SubscriptionDiagnostics>`
         """
         route_values = {}
@@ -67,8 +68,9 @@ def get_subscription_diagnostics(self, subscription_id):
 
     def update_subscription_diagnostics(self, update_parameters, subscription_id):
         """UpdateSubscriptionDiagnostics.
+        Update the diagnostics settings for a subscription.
         :param :class:`<UpdateSubscripitonDiagnosticsParameters> <azure.devops.v5_1.notification.models.UpdateSubscripitonDiagnosticsParameters>` update_parameters:
-        :param str subscription_id:
+        :param str subscription_id: The id of the notifications subscription.
         :rtype: :class:`<SubscriptionDiagnostics> <azure.devops.v5_1.notification.models.SubscriptionDiagnostics>`
         """
         route_values = {}
@@ -85,7 +87,7 @@ def update_subscription_diagnostics(self, update_parameters, subscription_id):
     def get_event_type(self, event_type):
         """GetEventType.
         Get a specific event type.
-        :param str event_type:
+        :param str event_type: The ID of the event type.
         :rtype: :class:`<NotificationEventType> <azure.devops.v5_1.notification.models.NotificationEventType>`
         """
         route_values = {}
@@ -135,7 +137,8 @@ def update_settings(self, update_parameters):
 
     def get_subscriber(self, subscriber_id):
         """GetSubscriber.
-        :param str subscriber_id:
+        Get delivery preferences of a notifications subscriber.
+        :param str subscriber_id: ID of the user or group.
         :rtype: :class:`<NotificationSubscriber> <azure.devops.v5_1.notification.models.NotificationSubscriber>`
         """
         route_values = {}
@@ -149,8 +152,9 @@ def get_subscriber(self, subscriber_id):
 
     def update_subscriber(self, update_parameters, subscriber_id):
         """UpdateSubscriber.
+        Update delivery preferences of a notifications subscriber.
         :param :class:`<NotificationSubscriberUpdateParameters> <azure.devops.v5_1.notification.models.NotificationSubscriberUpdateParameters>` update_parameters:
-        :param str subscriber_id:
+        :param str subscriber_id: ID of the user or group.
         :rtype: :class:`<NotificationSubscriber> <azure.devops.v5_1.notification.models.NotificationSubscriber>`
         """
         route_values = {}
diff --git a/azure-devops/azure/devops/v5_1/profile/models.py b/azure-devops/azure/devops/v5_1/profile/models.py
index ac41a19d..b527f6c5 100644
--- a/azure-devops/azure/devops/v5_1/profile/models.py
+++ b/azure-devops/azure/devops/v5_1/profile/models.py
@@ -84,8 +84,8 @@ def __init__(self, is_auto_generated=None, size=None, time_stamp=None, value=Non
 
 class CreateProfileContext(Model):
     """
-    :param cIData:
-    :type cIData: dict
+    :param ci_data:
+    :type ci_data: dict
     :param contact_with_offers:
     :type contact_with_offers: bool
     :param country_name:
@@ -105,7 +105,7 @@ class CreateProfileContext(Model):
     """
 
     _attribute_map = {
-        'cIData': {'key': 'ciData', 'type': '{object}'},
+        'ci_data': {'key': 'ciData', 'type': '{object}'},
         'contact_with_offers': {'key': 'contactWithOffers', 'type': 'bool'},
         'country_name': {'key': 'countryName', 'type': 'str'},
         'display_name': {'key': 'displayName', 'type': 'str'},
@@ -116,9 +116,9 @@ class CreateProfileContext(Model):
         'profile_state': {'key': 'profileState', 'type': 'object'}
     }
 
-    def __init__(self, cIData=None, contact_with_offers=None, country_name=None, display_name=None, email_address=None, has_account=None, language=None, phone_number=None, profile_state=None):
+    def __init__(self, ci_data=None, contact_with_offers=None, country_name=None, display_name=None, email_address=None, has_account=None, language=None, phone_number=None, profile_state=None):
         super(CreateProfileContext, self).__init__()
-        self.cIData = cIData
+        self.ci_data = ci_data
         self.contact_with_offers = contact_with_offers
         self.country_name = country_name
         self.display_name = display_name
diff --git a/azure-devops/azure/devops/v5_1/release/models.py b/azure-devops/azure/devops/v5_1/release/models.py
index 1453dba7..e462ec36 100644
--- a/azure-devops/azure/devops/v5_1/release/models.py
+++ b/azure-devops/azure/devops/v5_1/release/models.py
@@ -1431,8 +1431,8 @@ class MailMessage(Model):
     """
     :param body: Body of mail.
     :type body: str
-    :param cC: Mail CC recipients.
-    :type cC: :class:`EmailRecipients <azure.devops.v5_1.release.models.EmailRecipients>`
+    :param cc: Mail CC recipients.
+    :type cc: :class:`EmailRecipients <azure.devops.v5_1.release.models.EmailRecipients>`
     :param in_reply_to: Reply to.
     :type in_reply_to: str
     :param message_id: Message ID of the mail.
@@ -1453,7 +1453,7 @@ class MailMessage(Model):
 
     _attribute_map = {
         'body': {'key': 'body', 'type': 'str'},
-        'cC': {'key': 'cc', 'type': 'EmailRecipients'},
+        'cc': {'key': 'cc', 'type': 'EmailRecipients'},
         'in_reply_to': {'key': 'inReplyTo', 'type': 'str'},
         'message_id': {'key': 'messageId', 'type': 'str'},
         'reply_by': {'key': 'replyBy', 'type': 'iso-8601'},
@@ -1464,10 +1464,10 @@ class MailMessage(Model):
         'to': {'key': 'to', 'type': 'EmailRecipients'}
     }
 
-    def __init__(self, body=None, cC=None, in_reply_to=None, message_id=None, reply_by=None, reply_to=None, sections=None, sender_type=None, subject=None, to=None):
+    def __init__(self, body=None, cc=None, in_reply_to=None, message_id=None, reply_by=None, reply_to=None, sections=None, sender_type=None, subject=None, to=None):
         super(MailMessage, self).__init__()
         self.body = body
-        self.cC = cC
+        self.cc = cc
         self.in_reply_to = in_reply_to
         self.message_id = message_id
         self.reply_by = reply_by
diff --git a/azure-devops/azure/devops/v5_1/service_hooks/models.py b/azure-devops/azure/devops/v5_1/service_hooks/models.py
index 916159c3..1aa72214 100644
--- a/azure-devops/azure/devops/v5_1/service_hooks/models.py
+++ b/azure-devops/azure/devops/v5_1/service_hooks/models.py
@@ -1121,11 +1121,13 @@ def __init__(self, _links=None, action_description=None, consumer_action_id=None
 
 class SubscriptionDiagnostics(Model):
     """
-    :param delivery_results:
+    Contains all the diagonstics settings for a subscription.
+
+    :param delivery_results: Diagnostics settings for retaining delivery results.  Used for Service Hooks subscriptions.
     :type delivery_results: :class:`SubscriptionTracing <azure.devops.v5_1.microsoft._visual_studio._services._notifications._web_api.models.SubscriptionTracing>`
-    :param delivery_tracing:
+    :param delivery_tracing: Diagnostics settings for troubleshooting notification delivery.
     :type delivery_tracing: :class:`SubscriptionTracing <azure.devops.v5_1.microsoft._visual_studio._services._notifications._web_api.models.SubscriptionTracing>`
-    :param evaluation_tracing:
+    :param evaluation_tracing: Diagnostics settings for troubleshooting event matching.
     :type evaluation_tracing: :class:`SubscriptionTracing <azure.devops.v5_1.microsoft._visual_studio._services._notifications._web_api.models.SubscriptionTracing>`
     """
 
@@ -1214,7 +1216,9 @@ def __init__(self, consumer_action_id=None, consumer_id=None, consumer_input_fil
 
 class SubscriptionTracing(Model):
     """
-    :param enabled:
+    Data controlling a single diagnostic setting for a subscription.
+
+    :param enabled: Indicates whether the diagnostic tracing is enabled or not.
     :type enabled: bool
     :param end_date: Trace until the specified end date.
     :type end_date: datetime
@@ -1245,11 +1249,13 @@ def __init__(self, enabled=None, end_date=None, max_traced_entries=None, start_d
 
 class UpdateSubscripitonDiagnosticsParameters(Model):
     """
-    :param delivery_results:
+    Parameters to update diagnostics settings for a subscription.
+
+    :param delivery_results: Diagnostics settings for retaining delivery results.  Used for Service Hooks subscriptions.
     :type delivery_results: :class:`UpdateSubscripitonTracingParameters <azure.devops.v5_1.microsoft._visual_studio._services._notifications._web_api.models.UpdateSubscripitonTracingParameters>`
-    :param delivery_tracing:
+    :param delivery_tracing: Diagnostics settings for troubleshooting notification delivery.
     :type delivery_tracing: :class:`UpdateSubscripitonTracingParameters <azure.devops.v5_1.microsoft._visual_studio._services._notifications._web_api.models.UpdateSubscripitonTracingParameters>`
-    :param evaluation_tracing:
+    :param evaluation_tracing: Diagnostics settings for troubleshooting event matching.
     :type evaluation_tracing: :class:`UpdateSubscripitonTracingParameters <azure.devops.v5_1.microsoft._visual_studio._services._notifications._web_api.models.UpdateSubscripitonTracingParameters>`
     """
 
@@ -1268,7 +1274,9 @@ def __init__(self, delivery_results=None, delivery_tracing=None, evaluation_trac
 
 class UpdateSubscripitonTracingParameters(Model):
     """
-    :param enabled:
+    Parameters to update a specific diagnostic setting.
+
+    :param enabled: Indicates whether to enable to disable the diagnostic tracing.
     :type enabled: bool
     """
 
diff --git a/azure-devops/azure/devops/v5_1/task_agent/models.py b/azure-devops/azure/devops/v5_1/task_agent/models.py
index 4a74e41c..d5c1ca31 100644
--- a/azure-devops/azure/devops/v5_1/task_agent/models.py
+++ b/azure-devops/azure/devops/v5_1/task_agent/models.py
@@ -2321,8 +2321,8 @@ class TaskAgentMessage(Model):
 
     :param body: Gets or sets the body of the message. If the <c>IV</c> property is provided the body will need to be decrypted using the <c>TaskAgentSession.EncryptionKey</c> value in addition to the <c>IV</c>.
     :type body: str
-    :param iV: Gets or sets the initialization vector used to encrypt this message.
-    :type iV: str
+    :param iv: Gets or sets the initialization vector used to encrypt this message.
+    :type iv: str
     :param message_id: Gets or sets the message identifier.
     :type message_id: long
     :param message_type: Gets or sets the message type, describing the data contract found in <c>TaskAgentMessage.Body</c>.
@@ -2331,15 +2331,15 @@ class TaskAgentMessage(Model):
 
     _attribute_map = {
         'body': {'key': 'body', 'type': 'str'},
-        'iV': {'key': 'iv', 'type': 'str'},
+        'iv': {'key': 'iv', 'type': 'str'},
         'message_id': {'key': 'messageId', 'type': 'long'},
         'message_type': {'key': 'messageType', 'type': 'str'}
     }
 
-    def __init__(self, body=None, iV=None, message_id=None, message_type=None):
+    def __init__(self, body=None, iv=None, message_id=None, message_type=None):
         super(TaskAgentMessage, self).__init__()
         self.body = body
-        self.iV = iV
+        self.iv = iv
         self.message_id = message_id
         self.message_type = message_type
 
@@ -2645,8 +2645,8 @@ class TaskAgentReference(Model):
     :type id: int
     :param name: Name of the agent.
     :type name: str
-    :param oSDescription: Agent OS.
-    :type oSDescription: str
+    :param os_description: Agent OS.
+    :type os_description: str
     :param provisioning_state: Provisioning state of this agent.
     :type provisioning_state: str
     :param status: Whether or not the agent is online.
@@ -2661,20 +2661,20 @@ class TaskAgentReference(Model):
         'enabled': {'key': 'enabled', 'type': 'bool'},
         'id': {'key': 'id', 'type': 'int'},
         'name': {'key': 'name', 'type': 'str'},
-        'oSDescription': {'key': 'osDescription', 'type': 'str'},
+        'os_description': {'key': 'osDescription', 'type': 'str'},
         'provisioning_state': {'key': 'provisioningState', 'type': 'str'},
         'status': {'key': 'status', 'type': 'object'},
         'version': {'key': 'version', 'type': 'str'}
     }
 
-    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, oSDescription=None, provisioning_state=None, status=None, version=None):
+    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, os_description=None, provisioning_state=None, status=None, version=None):
         super(TaskAgentReference, self).__init__()
         self._links = _links
         self.access_point = access_point
         self.enabled = enabled
         self.id = id
         self.name = name
-        self.oSDescription = oSDescription
+        self.os_description = os_description
         self.provisioning_state = provisioning_state
         self.status = status
         self.version = version
@@ -4117,8 +4117,8 @@ class TaskAgent(TaskAgentReference):
     :type id: int
     :param name: Name of the agent.
     :type name: str
-    :param oSDescription: Agent OS.
-    :type oSDescription: str
+    :param os_description: Agent OS.
+    :type os_description: str
     :param provisioning_state: Provisioning state of this agent.
     :type provisioning_state: str
     :param status: Whether or not the agent is online.
@@ -4155,7 +4155,7 @@ class TaskAgent(TaskAgentReference):
         'enabled': {'key': 'enabled', 'type': 'bool'},
         'id': {'key': 'id', 'type': 'int'},
         'name': {'key': 'name', 'type': 'str'},
-        'oSDescription': {'key': 'osDescription', 'type': 'str'},
+        'os_description': {'key': 'osDescription', 'type': 'str'},
         'provisioning_state': {'key': 'provisioningState', 'type': 'str'},
         'status': {'key': 'status', 'type': 'object'},
         'version': {'key': 'version', 'type': 'str'},
@@ -4172,8 +4172,8 @@ class TaskAgent(TaskAgentReference):
         'user_capabilities': {'key': 'userCapabilities', 'type': '{str}'}
     }
 
-    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, oSDescription=None, provisioning_state=None, status=None, version=None, assigned_agent_cloud_request=None, assigned_request=None, authorization=None, created_on=None, last_completed_request=None, max_parallelism=None, pending_update=None, properties=None, status_changed_on=None, system_capabilities=None, user_capabilities=None):
-        super(TaskAgent, self).__init__(_links=_links, access_point=access_point, enabled=enabled, id=id, name=name, oSDescription=oSDescription, provisioning_state=provisioning_state, status=status, version=version)
+    def __init__(self, _links=None, access_point=None, enabled=None, id=None, name=None, os_description=None, provisioning_state=None, status=None, version=None, assigned_agent_cloud_request=None, assigned_request=None, authorization=None, created_on=None, last_completed_request=None, max_parallelism=None, pending_update=None, properties=None, status_changed_on=None, system_capabilities=None, user_capabilities=None):
+        super(TaskAgent, self).__init__(_links=_links, access_point=access_point, enabled=enabled, id=id, name=name, os_description=os_description, provisioning_state=provisioning_state, status=status, version=version)
         self.assigned_agent_cloud_request = assigned_agent_cloud_request
         self.assigned_request = assigned_request
         self.authorization = authorization
diff --git a/azure-devops/azure/devops/version.py b/azure-devops/azure/devops/version.py
index 743eacbd..fe405d71 100644
--- a/azure-devops/azure/devops/version.py
+++ b/azure-devops/azure/devops/version.py
@@ -3,4 +3,4 @@
 # Licensed under the MIT License. See License.txt in the project root for license information.
 # --------------------------------------------------------------------------------------------
 
-VERSION = "5.1.0b3"
+VERSION = "5.1.0b4"
diff --git a/azure-devops/setup.py b/azure-devops/setup.py
index 5d38de2e..6034dada 100644
--- a/azure-devops/setup.py
+++ b/azure-devops/setup.py
@@ -6,7 +6,7 @@
 from setuptools import setup, find_packages
 
 NAME = "azure-devops"
-VERSION = "5.1.0b3"
+VERSION = "5.1.0b4"
 
 # To install the library, run the following
 #