Forum Discussion
Mirrored Azure Databricks catalog not available
Hi All,
Thankyou for your suggestions!
With help from Microsoft support, I have now identified the root cause.
The issue is a limitation in using guest accounts with Mirrored Azure Databricks Catalogs.
To summarize, I have two Entra Id tenants A and B in my setup, applied as follows:
- Entra Id tenant A hosts my Fabric and Databricks workspaces.
- Entra Id tenant B contains the organisational account I was using to create the Mirrored Azure Databricks Catalog. That is, the account is a guest in Entra Id tenant A.
It turns out that this configuration is not supported by the current version of Mirrored Azure Databricks Catalog.
The fix is to use either a service principal or an organisational member account from tenant A to setup the connection.
Personally, I would appreciate a more general support for multi-tenant setups, as multi-tenancy is a fact of life in my organisation. Therefore, I have often run into limitations of this kind. One day I might even learn to check for this as a matter of course :).
Best Regards,
Søren
Following up on my initial question: When I try to create a connection to the Azure Databricks workspace using "Manage Connections and Gateways" in my Fabric workspace, I get the error information below, in case that provides any clues:
Details: Web.Contents failed to get contents from 'https://adb-XXXXXXXXX.azuredatabricks.net/api/2.0/clusters/list' (400): Bad Request Please have this information handy if you choose to create a support ticket. Session Id: xxx-yyy-zzz RequestId: xxx-yyy-zzz Cluster URI: https://api.powerbi.com Status code: 400 Time: Thu Aug 14 2025 15:21:55 GMT+0200 (Central European Summer Time)
Hi All,
Thankyou for your suggestions!
With help from Microsoft support, I have now identified the root cause.
The issue is a limitation in using guest accounts with Mirrored Azure Databricks Catalogs.
To summarize, I have two Entra Id tenants A and B in my setup, applied as follows:
- Entra Id tenant A hosts my Fabric and Databricks workspaces.
- Entra Id tenant B contains the organisational account I was using to create the Mirrored Azure Databricks Catalog. That is, the account is a guest in Entra Id tenant A.
It turns out that this configuration is not supported by the current version of Mirrored Azure Databricks Catalog.
The fix is to use either a service principal or an organisational member account from tenant A to setup the connection.
Personally, I would appreciate a more general support for multi-tenant setups, as multi-tenancy is a fact of life in my organisation. Therefore, I have often run into limitations of this kind. One day I might even learn to check for this as a matter of course :).
Best Regards,
Søren
Hi SørenBrandt ,
Good to know that you have found the root cause and were able to reach a conclusion that this configuration is not supported by the current version of Mirrored Azure Databricks Catalog.
Thanks for sharing this information with us. This will definitely help other users struggling with the same, figure out the issue.
Can you please mark your post as "Accepted solution" so that other users can also benefit from it?
Thank You.
