Side effects by Microsoft Teams App permission policy

This week I had a Aha event and some fun with side effect by the Microsoft Teams App permission policy. The customer disabled third party apps and allowed only a few Microsoft apps. For testing purposes, the customer created a user-based app policy, allowed some third-party apps in this policy and assigned it to some specific user accounts. With one of these users, we started to create a new private Microsoft Teams, which should be enabled as org-wide teams afterwards. During testing we saw some nice side effects of the arrangement of the Microsoft Teams app permission policies and it took some time to find the root cause for it. So, I like to report it to you in this blog post.

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