How do I add a backup phone number for MFA?


ITS encourages listing an alternate phone number or registering the mobile app on a second device (e.g. tablet) so you have a backup authenticator available if something happens to your primary device. You can update these settings at any time as your phone numbers or devices change.

Before you begin...

You must know your MSU Denver email credentials in order to add a backup phone number. 


  1. Log in to your MSU Denver email account through a web browser.
  2. Click the bubble in the top-right corner of the window where either your picture or your initials are displayed, then choose My Account.

Appearance of the O365 menu when clicking the portrait or initials

3. On the next page, find the Security info panel and select Additional Security Verification.

Appearance of the O365 My Account menu

4. On the next screen, check the box next to Alternate authentication phone.

5. Select your country code, then type your 10-digit phone number.

Screenshot of MFA setup menu for setting up additional phone numbers

6. Click Save to submit your changes.


You will have an alternative way of verifying Microsoft Authenticator if you are unable to verify through the MFA app or receive phone calls to your original phone number provided. 


Article ID: 120633
Wed 11/18/20 9:21 AM
Fri 2/26/21 7:34 PM