I have a Connected App in Org A, which is used to let their users log into Community B in Org B. The registration handler works fine, but only the OAuth scopes inside the Connected App are not considered.
Here are my settings in Org A's Connected App (yes, I waited more than 10 minutes to be sure). It includes "Access and Manage your Chatter data":
This is what users are presented when logging to the Community B, coming from Org A through the Connected App. It only shows "Access your basic information":
So.... maybe it is just not presented to the user, but in the background I could use the AccessToken to access some Chatter data? Unfortunately, also here it says that I am missing one of the three required OAuth scopes to do this:
Am I missing some setting, or don't I understand the concept behind Connected Apps and OAuth scopes?