Wrong mfa triggers when try to login with guest account in MS Teams client

Hi mohammad_Tayib,

can you try to do the following (do this while the New Microsoft Teams are running):

Open every single location with Windows Start + R (Run) and delete everything in the location:

%LocalAppData%\Packages\MSTeams_8wekyb3d8bbwe

%LocalAppData%\Packages\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy

%LocalAppData%\Microsoft\OneAuth

%LocalAppData%\Microsoft\TokenBroker

%LocalAppData%\Microsoft\IdentityCache

This should remove all active logged in users in your Microsoft Teams Client.

Then, log out from the Microsoft Teams and sign-in with the "main" user you are using.

After you sign-in, click on Add another account and add your guest account and check if the issue still exists.