To set up the Microsoft Authenticator app on multiple devices, please follow the steps below.

  1. Install the Microsoft Authenticator app on your second device.
  2. Open a browser on your computer and sign in to O365 at https://login.microsoftonline.com.
  3. Sign in with your EdUHK email address and password, then click "Next".
  4. Your will receive a notification on your registered device. Tap on the notification and choose "Approve".
    Office 365 Login

  5. Then click your profile icon in the top right-hand corner and select "View account".
    Access O365 My Account setting

  6. Choose "Security info" from the left menu, then click "+ Add method".
    Additional security verification

  7. Open the drop-down list and choose "Authenticator app", then click "Add".
    Choose to use Authenticator app

  8. Click "Next" if you have installed the Microsoft Authenticator app. If you have not downloaded the app, click "Download now".
  9. Click "Next".
    Authenticator app record

  10. When you see the following screen, open the Microsoft Authenticator app on your second device.
    MFA configure with QR code

  11. Click the + button in the top right-hand corner and choose “Work or school account”.
    Add account on Authenticator app
    Add account on Authenticator app

  12. Now scan the QR code on the browser with your device. If you cannot use your phone camera, click "Can't scan image?" to enter the 9 digit code and the URL instead.
    (Note: For iPhone users, you may need to change the app permission to scan the QR code: Settings > Authenticator > Camera)
    Scan QR code from Authenticator app icon

  13. A 6 digit code will be shown and your account is added.
    Authenticator app icon

  14. Click "Next" on your computer.
    MFA configure with QR code

  15. A notification is sent to the Microsoft Authenticator app on your second device.
    Authenticator app icon

  16. You will receive a notification on your second device.
    Authenticator app icon

  17. Tap on the notification and click “Approve” for verification.
    Authenticator app icon

  18. When you see the following screen, click "Next".
    Notification Approved

  19. Your second device is registered successfully and it will be shown in the list of security info methods.
    List of registered devices

  20. From now on, all your registered devices will receive notifications from the Microsoft Authenticator app when you sign in. You only need to verify on one of the devices.