teams infinite logging in

Hi @MP,

I completely understand why this would be frustrating, especially when it blocks access entirely and the issue has been discussed by users for quite a long time already. I know that is not the experience anyone expects from Teams.

This forum is mainly a user-to-user community, so while we can share the most common fixes and troubleshooting steps that have helped others in similar situations, me and other users unfortunately do not have direct access to Microsoft’s engineering systems or the ability to investigate tenant-level authentication problems from here.

You can also review these existing discussion and Microsoft guidance:

MS Teams infinite loop on sign-in

The most common fixes that have helped other users are:

• Completely quit Teams from Task Manager/system tray
• Clear the Teams cache and stored Windows credentials
• Remove unused work/school accounts under Windows - Settings > Accounts > Email & accounts
• Reinstall the latest Teams client
• Test sign-in in an InPrivate/Incognito browser session
• Allow third-party cookies for Microsoft login pages if using Teams on web

If the issue still persists after these steps, especially on a work or school account, it may require your IT admin to review Entra ID sign-in logs or Conditional Access policies, since some authentication loops can be caused by account or tenant-side configurations rather than the Teams client itself.