Combined SQL and Excel Spreadsheet

Hi carlwright,

As the dataset contains both SQL Server and SharePoint Excel data sources, to use on-premise data gateway, those two data sources need to be created under the on-premise data gateway.

In your scenario, assume the SharePoint Excel from the SharePoint online which requires Oauth2 authentication, then you won't be able to create a web source points to the SharePoint online data source, thus data gateway is no available in this scenario.

The good news is that the PG team already working on the feature data gateway supports OAuth2. The current ETA is end of August for availability in PowerBI.com. You can see latest update and comment on this idea: Combine enterprise gateway and online data sources.

Best Regards,
QiuyunYu