We have an ExB application running on top for ArcGIS Enterprise 10.9.0. AGS enterprise is using Integrated Windows authentication to authenticate users and Single Sign On is enabled (users never enter their credentials).
The application works fine, however after 30 minutes or so, they authentication seems to "timeout" and the user gets a message saying "Please sign in to access the item" (see below). You can't put your credentials here since the system is using IWA, so the only way to continue using the app is to reload the full app and start over again.
I thought it might be due to inactivity, but it's not. I even added a component that will make a query to Portal every minute to see if this will keep it alive, but didn't work.
Any thoughts on this?
We are experiencing the same behavior - did you ever figure this out?
I haven't unfortunately. I will open a support case soon, as this is starting to be a problem for us. I will post back if we find anything relevant.