A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
This is usually an MFA loop: the app is asking for approval from the same app that is not currently usable on the device.
Try these checks first:
- Open Microsoft Authenticator directly and make sure it is unlocked.
- Make sure notifications are enabled for Microsoft Authenticator and are not silent.
- Update to the latest version of Microsoft Authenticator.
- Check that the phone has a working internet connection. Switching between Wi‑Fi and mobile data can help.
- Verify the device date and time are correct.
If the sign-in page shows it, select Other ways to sign in and then choose Approve a request on my Microsoft Authenticator app.
If the account is a work or school account, Authenticator may need to be unlocked before the sign-in can be confirmed.
If the app was removed, the phone was changed, or no code/approval prompt appears, the registered authentication method may need to be reset or re-registered. For a school or work account, that typically requires the organization’s IT admin to reset MFA or require re-registration.
If the issue continues after the checks above, send diagnostic logs from Authenticator: Authenticator app menu > Send feedback.
References:
- Authentication did not complete
- Sign in using Microsoft Authenticator
- Authentication methods in Microsoft Entra ID - Microsoft Authenticator app
- Log in to authenticator app - Microsoft Q&A
- Unable to log in via Authenticator or Outlook app - Microsoft Q&A
- Log in Outlook without Microsoft Authenticator - Microsoft Q&A