Duo Authentication Loop on iPhone After Update

Environment

Duo mobile

Duo authentication loop on iPhone after an update

If you're experiencing a Duo authentication loop on your iPhone after an update, you can try these steps:

Check the time: Make sure the time on your phone is set correctly and that it's syncing automatically.
- If the server your app is hosted on is more than one minute ahead of Duo's cloud service, users may be redirected back to the Duo Prompt.
Check your network: Verify that your phone has network service.
- You can try turning your phone's Wi-Fi off and on again.
Update Duo Mobile: U-M blocks access from older versions of Duo Mobile.
- If your version is blocked, you'll need to update Duo Mobile and reauthenticate.
Reactivate Duo Mobile: If your Duo account is unlinked from Duo's servers, you can reactivate it through Duo Account Management.
- If you don't have access to the self-service portal, you can contact the ITS Service Center.
Check your content restrictions: Some iOS devices have configurable content restrictions that can prevent the Duo Prompt from displaying correctly.
Check your JavaScript settings: If JavaScript is disabled in the Safari browser settings, it can prevent the Duo Prompt from displaying correctly.
You can also try running the Duo Push Troubleshooting tool, which checks your device settings, internet connectivity, and more
- Menu icon (three horizontal lines) in upper left of Duo mobile app>Troubleshoot

Need additional information or assistance? Contact the ITS Service Center.

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