I have an angular js app that was built by a vendor partner and is having issues authenticating using IWA against Portal. The app previously worked fine with IWA when accessing services frm ArcGIS server 10.1. Now that we have upgraded to 10.7 and using Portal, the app doesn't get tokens as it is supposed to. Based on my reading the esri api should handle getting the token as it previously had. Am I missing something?
I have other apps that work fine but are not angular. One is just JS and one is webapp builder.
I appreciate any help.