When logging in as an Office365 Admin, the user can change his own MFA settings including Authenticator App and Phone numbers (Under Additional security verification)
However, this option is not available for all users:
Is there an alternative way to reset my account MFA?
12 Answers
As mentioned, can be used to reset or update your MFA methods.
Administrators can also reset another user's MFA through Then selecting Azure Active Directory -> Users -> Select the User -> Authentication Methods
There you can set up some types of authentication methods, require them to re-register, and reset their password as well.
1Yes!
Visit and continue by logging in with your Office365 account. Here you will be able to manage your info as needed: