Quick answer: if Microsoft Authenticator is not working on Android, first check your connection, restart the app, install available updates and restart the phone. Most temporary app problems can be narrowed down with these steps.
Fix Microsoft Authenticator not working
- Close Microsoft Authenticator completely and open it again.
- Switch between Wi-Fi and mobile data to test the connection.
- Check Google Play for an available Microsoft Authenticator update.
- Restart your Android phone.
- Open Android Settings → Apps → Microsoft Authenticator and review permissions and notifications.
- If appropriate, clear the app cache. Avoid clearing app data unless you understand that it may sign you out or remove local data.
Check whether the problem is account-specific
If the app opens but one feature fails, review the app’s own Help, Account or Privacy settings. Service-side outages can also affect many users at once, so local troubleshooting will not always resolve the issue immediately.
Reinstall only when needed
Before reinstalling, make sure you know your login details and that important data is synced. Reinstall from the official source rather than an unknown download page.
Open the official Microsoft Authenticator Google Play listing.