How to fix mixrosoft autheticato

Follow these steps to get Microsoft Authenticator working again on the new phone:

1. Check if notifications are going to the old phone
   • When signing in and expecting a push notification, it may still be sent to the Authenticator app on the old device.
   • If the old phone is available, open Microsoft Authenticator there and approve the sign-in.
2. Remove old devices and update security methods
   • Sign in to your Microsoft account security page in a browser: account security settings.
   • Remove any old devices from the account and make sure the current phone is added as a sign-in/verification method.
   • If SMS or email is available, use those temporarily to sign in and then re-register the Authenticator app on the new phone.
3. Use a different verification method if codes are not arriving
   • During sign-in, choose another method such as SMS or email if offered.
   • If SMS is not working and you see errors like “We cannot send a text message to this number,” avoid repeated requests and make sure the number is a mobile (not VOIP) number.
4. If locked out or cannot access any security info
   • If access to all security methods is lost, start from the sign-in page and choose I don't have any of these when asked to verify identity, then follow the steps to replace security info. Be aware this can trigger a 30‑day restriction before full access is restored.
5. Keep device list and Authenticator setup clean
   • After the new phone is working, remove Authenticator from old devices and keep the device list up to date in account security settings to avoid future notifications going to the wrong phone.

References:

• Microsoft Authenticator FAQs
• Troubleshoot Microsoft verification code issues