Additional sign-in or account-related issues within Microsoft Teams for business
I did this but also delete your keychain paswords for Teams. I went to keychain access and searched Teams. Then deleted 2 passwords. I also did the above process. When i opened Teams it gave me other sign in addresses as options and i selected the one i wanted and this time it let me put in a password. Before i deleted Keychain it was not asking for password and would not load.