True, that may be the case. There is config.office.com where you can adjust a lot of behavior (you need an admin account I believe). If teams gets installed with office on default settings, you can certainly change it there. However, I don't think we have changed anything there and it didn't get installed automatically.
"btw, teams is installed, try here" "login failed, maybe you are not allowed by your admins, nag them about it"
repeat every 2 weeks