Authenticator registered in old phone not working in new Phone

Question

I had registered authenticator in my old phone, now in my new phone I am not getting the codes. Help me fix this problem.

Answer 1

If you have registered the Microsoft Authenticator on your old phone and are now using a new phone, you will need to set up the Authenticator app again on your new device. Here are the steps you can follow:

1. Install the Microsoft Authenticator App: Download and install the Microsoft Authenticator app from the App Store (iOS) or Google Play Store (Android) on your new phone.
2. Set Up the Authenticator: Open the app and select the option to add an account. You may need to log in to your Microsoft account to link the new device.
3. Use Backup Codes or Alternative Authentication: If you have backup codes saved or can use another authentication method (like SMS or email), use those to log in to your account and set up the Authenticator on your new phone.
4. Disable Two-Factor Authentication Temporarily: If you are unable to log in, you might consider temporarily disabling two-factor authentication (2FA) from your account security settings if you have access to your account via a different method.
5. Contact Support: If you are still having trouble, you may need to contact Microsoft support for assistance, especially if you are locked out of your account.

Make sure to set up the Authenticator app on your new phone before removing it from your old phone to avoid losing access to your accounts.

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References:

• I have lost access to my Microsoft Authenticator account when my mobile device (iOS) got blicked.
• Authentication methods in Microsoft Entra ID - Voice call