Hi @Ferles, A. (Alexandros)
Do you mean it always asking for credentials when you restart Teams for Linux?
If you no longer need to use security feature, you can disable it to revert the settings to use the less secure one-step verification.
To disable two-step verification, use these steps:
1)Open the Microsoft account on the web.
2)Sign in with your credentials.
3)Click the Security tab.
4)Click the Advanced security options tile.
5)Under the "Additional security" section, click the Turn off option.
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