In our application there is a requirement to retrieve and display the replies on a threads. When ever we try to retrieve the thread and replies for guest user it gives 403 error for members can retrieve the same without any error. Guest can post a reply to threads without any issue. Below is the endpoint we are using to retrieve the threads with posts
https://graph.microsoft.com/beta/groups/<<groupid>>/threads/<<threadId>>?$expand=posts
error returned is
{"error":{"code":"ErrorAccessDenied","message":"Access is denied. Check credentials and try again."}}
client-request-id is :
80ac411f-bc1d-44dc-b56a-7aec8fb5f98e
