MFA-Duo - I am not getting login notifications on my iPhone
This document will explain why you are not getting notifications from the Duo Mobile App, as well as what settings to adjust to receive notifications
Checking for login requests
Duo Push delivery issues are most often resolved by pulling down on the screen to check for notifications in the Duo Mobile app:
When you do this, the Duo Mobile application will reach out to the Duo cloud service directly to check for login requests rather than using the push notification services. This is generally the most reliable way of receiving a login request and should work if the app and account are functioning properly.
If pull to refresh works
If push works by manually pulling to refresh but notifications are not received, it is most likely because you selected not to receive notifications when installing the application. The following process will also resolve a bug in iOS 10 that may require push notifications to be toggled off and back on for applications. The first time a Duo is installed, iOS asks if you want to receive notifications for that app. Once you select an option, the option is not presented again unless the device is restored or the app has been uninstalled for at least a day.
To check if push notifications are enabled for Duo Mobile, and re-enable them if needed, follow these steps:
On the iPhone, open Settings.
Scroll down and select Duo Mobile.
If "Allow Notifications" box is already checked, uncheck and then re-check it. If it was not yet checked, check it. Verify that notifications are configured how you want them.
Fully close (double-tap home button and swipe up) Duo Mobile.
Open Duo Mobile again.
If you continue to experience issues or pull to refresh does not work, consult the Duo documentation on this issue.