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How to fix authenticator app not sending/receiving codes?

Declan Dicks 5 Reputation points
2026-01-05T14:13:18.1133333+00:00

Every time I try to log into my cadet account it says my password is incorrect so I try and reset it. But when I do it tells me to type in a code from my authenticator app or type one into the authenticator app. Neither of these works as the authenticator app doesn't give me a code. How do I fix this?

Microsoft 365 and Office | Microsoft 365 Defender | Other | Android
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  1. AI answer

    2026-01-05T14:13:27.72+00:00

    If your authenticator app is not sending or receiving codes, there are a few troubleshooting steps you can take:

    1. Check the App Type: If you are using the Auth0 Guardian app, it does not provide a code like other apps such as Google Authenticator. Instead, it sends a push notification that you need to accept to complete the authentication process. Make sure you are checking for notifications from the app.
    2. Sync Clocks: Ensure that the clocks on your computer and mobile device are synchronized. If they are out of sync, it can cause issues with code generation. Check your device settings to make sure both devices have the correct time.
    3. Reinstall the App: If the app is still not functioning correctly, consider uninstalling and reinstalling it. This can sometimes resolve underlying issues.
    4. Use Alternative Methods: If the authenticator app continues to fail, consider using alternative methods for receiving codes, such as text messages or phone calls, if those options are available.
    5. Contact Support: If none of the above solutions work, you may need to contact product support for assistance in resetting your MFA settings.

    By following these steps, you should be able to resolve the issues with your authenticator app not sending or receiving codes.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Noel Macadangdang 16,840 Reputation points Independent Advisor
    2026-01-05T14:53:01.0233333+00:00

    Hi,

    Thank you for sharing your question, it sounds like you've worked hard to fix it! Not being able to log in because the Authenticator app won't give you codes can be annoying.

    This usually happens for a few reasons: your time might not be right, notifications could be off, or the app might not be set up right with your account. check that your phone's date and time are set to automatic. Also, be sure notifications are turned on, the Authenticator app is up to date, and battery saver isn't blocking it; this can fix most problems with codes or notifications not showing up.

    I suggests some other things. If you aren't getting codes, first see if the app uses push notifications instead. If you get a notification when you try to log in, that's probably it. Then, check if your device's time is right. If it is, try deleting and reinstalling the Authenticator app. If that doesn't work either, try using text messages to log in or contact support to reset your MFA.

    Go to your phone’s date and time settings and turn on “Set Automatically” to make sure the app's codes match the server.

    Go to your phone's notification settings and be sure the Authenticator app can send push notifications or show codes.

    Go to the App Store or Google Play Store and update the app.

    Turn off battery saver for the Authenticator app; it might be stopping it from running in the background.

    If that doesn't fix the issue, delete and reinstall the Authenticator app.

    Log into your account's security settings (like at https://mysignins.microsoft.com/security-info), remove the Authenticator, and add it again by scanning the QR code to reconnect the MFA.

    I hope this helps.

    Best Regards,

    Noel

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