A video for managing devices can be found here: https://www.youtube.com/watch?v=jTwtosQkn6I
Adding an authenticator app:
- Log into mysignins.microsoft.com
- Select "Security info"
- Select "Add method" to add an authenticator app or phone number.
- Select "Delete" to remove old devices or phone numbers
- If you have a new cell phone and are using the authenticator app you will first delete your old device from the Security info page.
- Select "Add method" and choose "Authenticator app".
- Download the authenticator app on your mobile device.
- On your computer, select next until and you will be prompted with a QR code.
- On your phone with the Microsoft Authenticator app open, select the three dots in the top right and choose "Add account".
- Choose "Work or school account"
- Choose "Scan a QR code"
- Your camera will now be activated. Aim the mobile camera at the QR code displayed on your computer.
- Your account is now linked to the app. You will be prompted to accept sign in the app. Once approved, you will be routed to your email inbox.