In Microsoft Teams I added a Website Tab which points to an ArcGIS Online Web App. When a user goes to this tab they are presented with the AGOL login page asking if they wish to use their Enterprise login or ArcGIS login. If ArcGIS login is chosen, the web app will load successfully. If Enterprise login is chosen the default browser (IE, Chrome etc) is opened with the error "Unable to login using Idp client_id not specified. Error 400".
Wondering has anyone experienced this and does this error likely point towards ESRI, Microsoft or some internal settings issue?