You can choose from several MS MFA options and can use different options in different situations, depending on what is most convenient for you.

Option 1: Authentication Phone – (Call or text a phone number)

Call me         If you select the Phone Call method, you are setting up your MFA authentication to call you when you want to authenticate.  It is recommended to use a mobile phone that you always have with you, so you can authenticate no matter where you are located. You will need to be able to access the phone during configuration. You will also enter a backup phone number that will be used if the first phone number is not answered or goes to voicemail.

Send me a code by text message         If you select the text message method, you are setting up your MFA authentication to send you a text message with a 6-digit code to use when you authenticate.  It is recommended to use a mobile phone that you always have with you, so you can authenticate no matter where you are located. You will need to be able to access the phone during configuration. You will also enter a backup phone number that will be used if the first phone number is not answered or goes to voicemail.

Option 2:  Call My Office Phone

This option is currently not available.

Option 3: Mobile App – (Microsoft Authenticator App) – Best User Experience

Download and install the Microsoft Authenticator App – https://www.microsoft.com/en-us/account/authenticator

Receive notifications for verification        This option pushes a notification to the authenticator app on your smartphone or tablet. View the notification, and if it is legitimate, press   Approve or   Deny to confirm that you expected that login, and the rest is automatic.

Use verification code       For this option, the authenticator app generates a verification code that updates every 30 seconds. Enter the most current verification code in the sign-in interface.