By setting up MFA, you add an extra layer of security to your Microsoft 365 account sign-in. For example, you first specify your password and, when prompted, you also type a verification code sent to your phone.

1. Login to Office 365 Admin portal, under Active users select Multi-Factor Authentication, Select Service Settings, Select Call to Phone

2. 
   

3. 

4. Enable MFA for user

5. On the user's computer, browse to https://portal.office.com

6. Sign in to Microsoft 365  with your password like you normally do. After you choose Sign in, you'll be prompted for more information.

7. Choose Next.

8. Select your verification method and then follow the prompts on the page.
   Alternate Phone #: 519-888-7171 - Method: Call Me

9. From your cell call -519-888-7171. You will be told that one time MFA has been set, then click Next

10. After you test your additional verification method, choose Next.

11. Setup Microsoft Authenticator App/Phone number verification for user as well. Change default to "Use verification code from app.." Should look similar to below:

Usage

Before signing into a user who has MFA enabled, call 519-888-7171 from your phone. Wait for prompt to notify that MFA has been set.

Logon to user's account and select "Sign in another way"

Select Call +X XXXXXXX71 to initiate MFA authentication