Use the Microsoft Authenticator app to scan the QR code or manually input the key. The app will give you a code to enter. Go back into Facebook and input the code.

For backup, save or print the QR code as a PDF or on paper. If you lose access, you’ll need to disable and re-enable 2FA to get a new QR code. How do I use Microsoft Authenticator on my PC? You ...

Open the Microsoft Authenticator app on your old phone. ... However, some accounts may ask you to revalidate your identity by either logging in again or scanning a QR code.

Open the Microsoft Authenticator app on your new phone. Tap Begin recovery. Sign in to the Microsoft account (iCloud for iOS users) you used to back up your data on your old phone.

Adding accounts to the Microsoft Authenticator app is as easy as giving the app access to your camera and then scanning a QR code or typing in a verification code.

By limiting the number of fields Authenticator considered when adding accounts via QR codes, ... “This now brings Microsoft Authenticator back on par with other phone-based TOTP authenticators.