Authenticator app not working

Try the following checks to get Microsoft Authenticator working again:

1. Make sure the app is unlocked
   • Open Microsoft Authenticator directly on the phone.
   • If it shows a lock screen or requires PIN/biometric, unlock it first, then try signing in again.
2. Check notifications
   • On the phone, open Settings → Notifications.
   • Ensure notifications are enabled for Microsoft Authenticator and not set to “silent.”
   • If using SMS or email codes as backup, check those inboxes (including spam) in case the code arrived silently.
3. Update the app
   • Open the app store on the device.
   • Install any available update for Microsoft Authenticator. Older versions (more than 12 months old) are not supported.
4. Check network and VPN
   • Ensure the phone has internet access.
   • If on Wi‑Fi, try switching to mobile data (or vice versa).
   • Turn off Airplane mode if enabled.
   • If using a VPN, temporarily disconnect and try again.
5. Verify device date and time
   • In device Settings, ensure Date & Time are correct and set to automatic if possible.
6. Improve background operation
   • In Authenticator → Settings, turn off battery optimization for the app so it can sync and receive prompts reliably.

If the app still “is not working” after these steps and sign‑in cannot be completed, contact the account’s IT admin or Microsoft Support to review or reset authentication methods.

References:

• Troubleshoot problems with Microsoft Authenticator
• Authentication did not complete
• Authenticator Did Not Complete Login