Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
It's more then just this it seems. Why they are forcing their second rate authenticator is beyond me but it's annoying. In Entra (old Azure) at https://entra.microsoft.com/ :
Protection -> Authentication Methods -> Settings -> System-preferred multifactor authentication: Disabled
Protection -> Authentication Methods -> Registration Campaign: Edit then Disabled and Save
Protection -> Authentication Methods -> Policies: Click Microsoft Authenticator and switch it to Disabled (if you want) then go to the others you do want and make sure they are enabled for all users (or whatever users you want). We have SMS, Voice Call, and Email OTP personally.
This is the answer. Thank you, ADynes!
Forcing us to use the Microsoft Authenticator is a mistake, Microsoft. Most of your users don;t have faith in your products. We'd rather use anything else to authenticate.