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      Setup the Microsoft Authenticator App

      The easiest verification method for multi-factor authentication (MFA) is to use is Microsoft Authenticator App. The app allows for one click verification instead of typing in a 6-digit code. And if you travel, you won't incur roaming fees.

      Note: Before attempting to configure the Authenticator app your account must be enabled for multi-factor authentication by the organizations administrator. If you are not sure the account is enabled for MFA please contact your local help desk. If you do not have a local administrator please email support@protectedtrust.com.

      You can follow these steps if you're prompted to set up your security info immediately after you sign-in to your work or school account. You'll only see this prompt if you haven’t set up the security info required by your organization. If you've previously set up your security info, but you want to make changes, you can follow the steps in the various method-based how-to articles.

      Set up MFA with Authenticator App:

      1. Download and install Microsoft Authenticator App for your mobile device.

        •iPhone - Use the App Store

        •Android - Google Play Store

      2. Open a browser on your computer and go to http://portal.office.com sign in to your Office 365 work or school account. If MFA is enabled/enforced you will be presented with a different login prompt.

      3. Select Next

      4. Choose Mobile App from the drop down.

      5. Make sure "Receive Notifications for Verification" is selected.

      6. Select Set up.

      7. Wait for a configuration pop-up box that looks like this:Follow the steps on your screen.


        Note: iPhone users may have to enable the camera in Settings in order to scan the QR code.

      8. Open the Microsoft Authenticator App on your phone

      9. Tap the + > Work or School Account

      10. Use your phone to scan the QR square located on your computer screen.

      11. Your account will added automatically to the app and will display a six-digit code.

      12. Switch back to your computer and select Next.

      13. Now wait for the checking activation status to finish configuring your computer and select Next.

      14. Switch back to your phone. It will request you to approve sign in. Select Approve.

      15. When it's complete, you'll be able to select on the Next button on the right.

      16. On the next screen, select Done.

      Note: If configuration fails, just retry the previous steps again or contact your administrator.

       

      Source: https://docs.microsoft.com/en-us/azure/active-directory/user-help/security-info-setup-signin