GET /v1.0/teams/{id}/channels returns HTTP 403 error

Brass Contributor

I met HTTP 403 error when invoking GET /v1.0/teams/{id}/channels request.


The error message is:



  "message":"Request is not allowed for externally authenticated users",




I have granted the Channel.ReadBasic.All permission to Azure AD app and the access token has Channel.ReadBasic.All scope. The delegated user is a guest user, but the same request was successfully invoked in past. There are no change in Teams Admin settings and Azure AD settings.


I want to know how to resolve the issue. Is it caused by any settings?

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