Microsoft MFA (How To) Enrolling a Phone Number for Voice Call from Sign in Prompt

This article provides instructions for setting a phone call (voice call) as a primary authentication method from a sign in prompt.

With Microsoft MFA, users have the option to enroll a phone number to use as an authentication method. However, because Teams is Microsoft authentication dependent, you *MUST NOT* submit a Teams phone as a verification method. A mobile phone number or home phone number (landline) may be used as a primary or secondary authentication method. With phone call verification during Multi-Factor Authentication, an automated voice call is made to the phone number registered by the user. To complete the sign-in process, the user is prompted to press # on their keypad.

To enroll a phone number as the primary authentication method with Microsoft MFA from a sign in prompt:
Note: You will only receive the sign in prompt to enroll in Microsoft MFA if you have not previously enrolled.

1. Sign in with your UWM email address and password.

Sign in with UWM Email and password


2. You will be notified that More information is required. Click Next.

More information required prompt


3. On the next page, you will be prompted to Keep your account secure, and will see a prompt to get the Microsoft Authenticator app. At the bottom of this prompt there is the option to set up a different method. Click the link titled I want to set up a different method.

Keep your account secure, set up a different method


4. This will bring up the option to Choose a different method. From the drop-down menu select the Phone option and click Confirm.

Choose a different method drop-down Choose a different method, phone, confirm


5. Select your country code from the drop-down menu The default option is United States (+1).

Enter phone number


6. In the text box titled Enter phone number, enter your 10-digit phone number including the area code. DO NOT ENTER YOUR TEAMS/UWM PHONE NUMBER!!!

7. Select the Call me option and click Next.

8. You’ll receive a phone call from Microsoft, asking you press the pound (#) sign on your phone to verify your identity. Answer the call and press pound (#) on your phone’s dial pad to verify.

Phone Verification Screen


9. After you verify your identity, your phone will be set up as your primary authentication. Click Next.

Phone Registered Successfully


10. You will be prompted to set up a backup method.

Back up method prompt


11. Continue to add your desired authentication method as a backup.
Note: The email and security questions option will only work for password recovery.

12. If you wish to set up an email or security questions, click the link titled, I want to set up a different method.

13. This will bring up the option to Choose a different method. From the drop-down menu select the Email or Security Questions option and click Confirm.

Choose a different method, email or security questions


14. If you selected Email, enter your non-UWM email address in the text box and click Next.

Enter non-UWM email address


15. When prompted, enter the verification code that was sent to your non-UWM email address and click Next.

Enter email code


16. On the next screen you will receive a notification that you have successfully enrolled. Click Done.

Success notification


17. You will be brought to the My Sign-Ins page. If you are done making changes you can click on your Person icon and Sign out.

Person icon - Sign out


18. If you selected Security Questions, choose three questions from the drop-down menus, and enter your answers in the text box for each question.

Security Questions


19. After selecting your Security Questions and providing answers, click Done.

20. You will be brought to the My Sign-Ins page. If you are done making changes you can click on your Person icon and Sign out.

Person icon - Sign out


21. The next time you login, you will be prompted for Microsoft MFA after entering your UWM Email address and Password. Select how you would like to authenticate and continue with that process.

Verify your identity MFA Prompt


22. To save time authenticating select the option, Don’t ask again for 14 days when prompted.

Don't ask again for 14 days




Keywords:Microsoft, MFA, Office, M365, O365, 365, Azure, phone, call, voice, #, primary, authenticate, authentication, method, multi, factor, multi-factor, secure, security, securely, home, calls, cell, mobile,   Doc ID:73973
Owner:Help Desk K.Group:UW-Milwaukee Help Desk
Created:2017-06-09 13:30 CSTUpdated:2021-11-12 13:56 CST
Sites:UW-Milwaukee Help Desk
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