Step 1. On your PC/laptop, open your browser (Google Chrome or Microsoft Edge) and type in https://aka.ms/MFASetup
Once presented with the below screenshot, pick your account to sign in with.

 

Step 2. Enter your password and click Sign in

 

Step 3. Select Set up

You should now be presented with the following screen

 

Step 4. Open the Microsoft Authenticator application on your iPhone.

 

Step 5. Click on Add Account. It will then ask if you have a backup, press Continue.

Step 6. On the next screen, select Work or School Account

Step 7. You will then be presented with the below screen to scan the QR Code on your Desktop screen.

 

Step 8. Hover over the QR Code on your Desktop screen to scan the QR Code.
Your iPhone screen should go back to the Account screen and you should now have an account listed with the title Settlement Services International or Microsoft.

 

Step 9. Go back to your Internet Browser now and select Next on the page

Step 10. You should only have one option Use Verification Code. Select Next on screen.

 

Step 11. A code should generate on the iPhone Microsoft Authenticator application. Place the number in the box that says Enter the verification code displayed on your app. Press Verify.

Step 12. Your screen will return to the below screenshot. If you see the message Verification successful. Taking you to the next step.., then you have successfully setup your MFA. Select Done.