Hey Chris,

Just sharing this with you (were going to ask the question of databricks anyway) however, we have managed to get something working by;

1/ Generating an AAD token (one of the huge ones) from the command line (i.e. https://learn.microsoft.com/en-us/azure/databricks/dev-tools/api/latest/aad/user-aad-token)

2/ Using THIS token as the Bearer token in the REST call to .../token-management/on-behalf-of/tokens

3/ This gives us a PAT and no error, this PAT then actually works in PowerBI.

Disclaimer, we don`t know if this PAT is retaining it`s lifetime yet.

Andy