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.

The Microsoft Authenticator app is not displaying code – Possible causes Time synchronization issues: The Microsoft Authenticator App generates the TOTPs based on time-sensitive algorithms.

Open the Microsoft Authenticator app on your new phone. Tap the “+” button to add an account. Choose how you want to add the account (e.g., scanning a QR code, entering a setup key).