Forum Discussion
Super UserCannot create Notebook connection with Workspace Identity authentication
Hello apturlov,
You’re seeing the DMTS_InvalidCredentialTypeError because Notebook connections in pipelines don’t yet support Workspace Identity authentication, even though the Fabric UI currently shows it as an option.
The backend rejects this credential type, which is why the API call returns 200 OK but includes the error object.At the moment, the only supported authentication method for Notebook connections in pipelines is Service Principal. Workspace Identity support is planned and has started rolling out, but it isn’t fully enabled yet — so this isn’t a regional issue or a misconfiguration on your side.
For reference:
Microsoft Learn – Authenticate with Workspace Identity
Explains where Workspace Identity can be used. Notebook pipeline connections are not yet listed as supported.
Microsoft Fabric Blog – Run Notebooks in Pipelines with Service Principal or Workspace Identity (Connie Xu, Dec 2025) confirms that Workspace Identity support for Notebook activity in pipelines is rolling out gradually and is expected to be fully available by early 2026.
So for now, if you need to proceed, you’ll need to configure the connection with a Service Principal until Workspace Identity becomes generally available.
Super UserHello apturlov,
You’re seeing the DMTS_InvalidCredentialTypeError because Notebook connections in pipelines don’t yet support Workspace Identity authentication, even though the Fabric UI currently shows it as an option.
The backend rejects this credential type, which is why the API call returns 200 OK but includes the error object.
At the moment, the only supported authentication method for Notebook connections in pipelines is Service Principal. Workspace Identity support is planned and has started rolling out, but it isn’t fully enabled yet — so this isn’t a regional issue or a misconfiguration on your side.
For reference:
Microsoft Learn – Authenticate with Workspace Identity
Explains where Workspace Identity can be used. Notebook pipeline connections are not yet listed as supported.
Microsoft Fabric Blog – Run Notebooks in Pipelines with Service Principal or Workspace Identity (Connie Xu, Dec 2025) confirms that Workspace Identity support for Notebook activity in pipelines is rolling out gradually and is expected to be fully available by early 2026.
So for now, if you need to proceed, you’ll need to configure the connection with a Service Principal until Workspace Identity becomes generally available.