The Scan the QR code window will appear. Keep this window open and proceed to the next step.
Add your Fredonia account:
Open the Microsoft Authenticator in your phone
Tap the plus sign (+) in the upper right to add an account.
Tap Work or school account and then tap Scan a QR code.
Aim your phone at the QR code on the screen (from step 3 above).
Click Next on the Configure mobile app page on your computer.
Approve the sign in request on your phone. This completes the setup process.
Please Note: After setting up the Microsoft Authenticator app, you'll see the Approve sign-in notification on your phone anytime you sign-in to your email account for the first time on a new device. After the initial sign-in, the device will be trusted and will no longer prompt for approval the next time you sign-in to Office 365.
This video demonstrates how to register for multi-factor authentication using the Microsoft Authenticator app.