Bug - External Access accounts are being removed automatically
Guest access is being removed - according to the thread history by my user. However, the first time that the guest was removed by my user I was offline, the second time I was idle.
Teams appears to be removing guest user access.
Pieter Veenstra commented
This isn't an issue at it is described. Guest users are removed when the guest roll within Teams hasn't been enabled.
See also here for the solution: https://techcommunity.microsoft.com/t5/Microsoft-Teams/Added-guest-user-keeps-getting-removed-automatically/m-p/108214#M7494
Juliano Jeziorny commented
We also having he same issue, a while after adding an external user it got removed by a member of the team automatically.
After this happened the second time I removed owner permission from this specific team member and re-added the external user, a while later it got automatically removed by another member of the team.