Using classic Outlook for Windows in business environments
I sifted through all the Azure / Entra / Teams / Office 365 and whatever else interfaces now and disabled everything related to Microsoft Authenticator, while keeping only SMS and E-Mail OTP enabled, and all that happened when I was done was that team members trying to use their Teams account got an error on login, until I at least reenabled MS Authenticator under Entra admin center > Protection > Authentication methods > Policies, which again causes users to be forced to use MS Authenticator with no way out.
We're only using the Teams part as an alternative to our self-hosted WebRTC based conferencing solution, and we definitely do not want our users to install the MS Authenticator app just for that purpose.