mTLS Support

[neodaemerung]

Prerequisites

• I have searched the existing issues and this feature has not been requested yet

Is your feature request related to a problem?

Self-hosted services like Nextcloud and CalDAV server can be configured with a mTLS certificate for a strong security. Clients need to support it to be able to consume the service.

Describe the solution you'd like

Being able to add a mTLS certificate: .pem, .p12, etc when adding an account like Nextcloud and CalDAV server.

Alternatives you've considered

No response

Additional context

No response

[alainm23]

Hey! Thanks for the detailed request

mTLS support is a valid use case, especially for corporate or high-security self-hosted setups. It would require changes at multiple layers — UI for certificate selection, passing it to the HTTP session, and storing it securely.

It's not on our short-term roadmap, but keeping this open as a future enhancement. PRs are welcome if someone wants to take a stab at it!