Duo Authentication Loop on iPhone After Update

Environment

Duo mobile

Issue

Duo authentication loop on iPhone after an update

Resolution

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

Additional Information

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