What error message appears when Teams cannot be logged in?
Have you tried to uninstall and then reinstall the latest version to check this issue?
Are you able to login with another Teams account on this same device?
Here are a few possible solutions you can try:
- It is recommended that you can firstly try to check for updates. If there’s a new Teams app version available, install it and check if the issue is gone.
- You could connect to a different network environment and try again to see if you can login.
- You may also manage to clean the Teams cache, and then check if the issue is gone.
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