Additional sign-in or account-related issues within Microsoft Teams for Education
Hello G. Carbone,
Good day.
Per the description you have shared (disable the password saving in window), after thorough research and consulting your query is related to window Team. We have limited knowledge about window.
It will be best if you reach out to them so you can be assisted accurately. Please contact them via Windows 10 - Microsoft Q&A.
In the meantime, i would like to inform you when using Microsoft applications like Teams, after you login with your credentials the window "Stay signed in to all your apps" will pop up. If you click on "Ok" button, the device will be AAD joined. After this you will be able to logon Teams without a password. In this way, to avoid this issue the device must be removed from AAD (Intune team can help you on that Microsoft Intune - Microsoft Q&A), clear the credential manager and you should be able to manage it locally.
For other concerns, please do not hesitate to add you post in the Microsoft Community Team.
Appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Eben Ezer Tres | Microsoft Community Moderator