1. Download Microsoft Authenticator app on your phone

iOS/iPhones - https://apps.apple.com/us/app/microsoft-authenticator/id983156458

Android - https://play.google.com/store/apps/details?id=com.azure.authenticator

2. On your computer, go to https://aka.ms/mfasetup 

3. Log in with your email address and current password. 

4. You’ll be prompted with the following box, keep pressing next and follow the directions until registration is successful.