AADSTS50020: protected PDF issue for external users
I have been recently (don't know when it was started) observed getting error from protected PDF (sensitivity label with user defined permission) file while trying to open that pdf via AIP viewer mobile app (Android/iOS) AS external user (who has permission to open/view). No issue with Office file types protected. external (not internal, not guest) user (currently testing with gmail.com account, other O365 tenant user) getting error as attached from AIP view mobile app. We do have AIP excluded at conditional access policy which helped so far to avoid this problem for external users. Is there been any recent change in behavior around user defined protected PDF? Since user having problem is external, have no clue where to look for log and start investigation. Error code: AADSTS50020
