MFA: Changing phones or phone numbers

This article explains how to update your MFA verification methods if you are changing phone numbers or replacing your phone or mobile device that you use for MFA.

Summary

This article explains how to update your MFA verification methods if you are changing phone numbers or replacing your phone or mobile device that you use for MFA.

 

Content

 

Changing phone numbers? Make sure to update your MFA settings!

If you are planning on changing the phone number that you use for multi-factor authentication (MFA) verification, be sure to install and set up the free Microsoft Authenticator App BEFORE you change your number:

• Installing the Microsoft Authenticator App
• Setting up the Microsoft Authenticator App using a computer - recommended method
• Setting up the Microsoft Authenticator App using Mobile Phone/Device only

Once you have registered the app with your account, you can use it for MFA verification using a passcode without the need for a phone number or SIM card.

After registering the App and changing your phone to the new number, be sure to update your MFA verification methods with your new phone number for SMS text messages or phone call.

Important: If you have already changed your phone number and do not have service to your old number, then you must call the Technology Help Desk or visit in person to set up the Microsoft Authenticator app on your new phone.

 

Getting a new phone or mobile device? Make sure to update your MFA settings!

If you are planning on replacing a phone or mobile device that you use for multi-factor authentication (MFA) verification, be sure to both

A.  Install and set up the free Microsoft Authenticator App BEFORE you you move off your old phone or device:

• Installing the Microsoft Authenticator App
• Setting up the Microsoft Authenticator App using a computer - recommended method
• Setting up the Microsoft Authenticator App using Mobile Phone/Device only

and

B. Add or confirm your backup MFA verification methods BEFORE you move off your old phone or device:

• Adding Backup Multi-Factor Authentication (MFA) Methods

After you have two or more MFA methods and have your existing phone number ported to a new phone or device, then you are ready to follow these steps:

• Setting up Authenticator App on a new phone

​​​​​​Important: If you did NOT have a backup MFA method on your old phone, then you must call the Technology Help Desk or visit in person to set up the Microsoft Authenticator app on your new phone.

 

Further Readings

MFA: Installing the Microsoft Authenticator App

MFA: Setting up Multi Factor Authentication (MFA) for M365 - using a computer (recommended method)

MFA: Setting up Microsoft Authenticator App using Mobile Phone/Device only

MFA: Adding Backup Multi-Factor Authentication (MFA) Methods

MFA: Setting up Authenticator App on a new phone

MyAccount: Updating Security Info for password recovery and MFA verification

MFA: Using Authenticator App without Cell Service

 

Need additional help?

Visit the Technology Help Desk Support page to locate your local campus contact information or to submit an online technology support request. For password issues you must call or visit the Help Desk in person.