
A window will appear asking "Are you sure you would like to delete this method?" Click "Ok". Next to "Microsoft authenticator" click "Delete". You will now see the list of authentication methods you set up when configuring 2FA. On the "Security info" tab, click " "Update info". Microsoft authenticator is my primary 2FA authentication method: If you change your mobile device but keep the same number, no action is required.
Text (SMS) is my primary 2FA authentication method: