You can use Microsoft Authenticator on multiple devices by scanning the same QR code during setup. When the QR code is displayed, scan it on both phones to ensure they generate identical codes.

3. Step-by-step guide to set up login with Microsoft Authenticator app. Open the service that you want to use with Microsoft Authenticator. Go to its security settings and look for the authenticator ...

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.

Microsoft will end password support in Authenticator by August 2025, shifting to Microsoft account syncing via Edge.

Starting in August, your saved passwords will no longer be accessible in Microsoft's Authenticator app. You have several options.