Hello,
Authentication with Azure DevOps Services is done automatically when you authenticate using Azure Active Directory (Azure AD).
Note: The Azure DevOps Services organization must be linked to the same Azure AD tenant as Databricks -which means currently Databricks must be located in the same tenant as DevOps.
The error occurs due to known issue where your Databricks and your Devops are in different AAD tenants which fails the passthrough sign in and blocks them from using the feature altogether.
You may checkout
GitHub issue, which addressing similar issue.
For more information, see the Databricks documentation on Azure DevOps Services integration.
Hope this helps. Do let us know if you any further queries.
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