Describe the bug
We have MS Teams App where we are facing this issue. Initially when application loads it get all joinedTeams and its channels. JoinedTeams are loading correctly but Channels APIs are failing saying forbidden. Attaching screenshot where you can see joined teams are 5 but on left it showing only one. And subsequent calls are failing as well.

Image which showing channels calls failing. 403 Error message is ”Failed To Execute Skype Backend Request Get Thread S2SRequest ”

To Reproduce
Steps to reproduce the behavior:
Create New User
Assign Groups from portal.azure.come AD
User Logins to Account
Loads app and it will start throwing error. (You can simulate by calling graph API call once logged in). /teams/${team.id}/channels GET call
Expected behavior
As Channels are already available, it should not fail.
Screenshots
Attached above in Bug description
Environment (please complete the following information):
OS: iOS
Browser All
Framework react
Context Microsoft Teams
Version Unsure
Provider
Question earlier asked on https://github.com/microsoftgraph/microsoft-graph-toolkit/issues/1663 and author told us to report it over here.