Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Based on my test, admin first need to make sure all necessary verification options enabled to users. Go to Multi-Factor Authentication > service settings > Under verification options, check all of the boxes for methods available to users. Reference for you: https://docs.microsoft.com/en-us/azure/active-directory/authentication/howto-mfa-getstarted#choose-verification-options
During MFA verification, if the user account has not registered for MFA before, Azure AD will prompt the user to complete MFA registration first – “Your organization needs more information to keep your accounts secure”.
Hi Linda, thanks for the answer. Up to this point is fine. But after clicking next, this screen appears:
As you can see, there is no option for choose another method.
Of course, all methods are allowed in the service settings and the authentication phone number has been entered in the user's account.