Trying to use the Unified API to fetch all groups. Using this URL - https://graph.microsoft.com/beta/myorganization/groups but getting 403 - code: "Authorization_RequestDenied", message: "Insufficient privileges to complete the operation".
However, it seems like I do have the right permissions - I have Group.Read.All in my token scope which is what's required by this API - see here.
Could it be because I'm using the Office 365 Unified API as another service (acquiring a separate access token) alongside the old existing code that already uses graph.windows.net?