If you have an issue with Teams going back to the sign in page after inputting email address (won't log in).
If it is a mobile device remove the Teams app & then reinstall.
If it is a windows PC or laptop remove temporary/cache files from Teams as follows:
- Quit Microsoft Teams (click on up arrow on task bar then right click on Teams & quit)
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- Navigate to the folder in the path below
For 'New' Teams - C:\Users\%username%\AppData\Local\Packages\MSTeams_8wekyb3d8bbwe
For 'Old' Teams - %appdata%\Microsoft\Teams
- If you can't see the AppData folder click on View - Show - Hidden Items
- Delete contents of the entire folder
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- Restart Teams