I created a webmap in ArcGIS Online. Added my feature service for editing and a mapservice.
On one of the layers in the map service, I configured the popup with "Show related data".
This is the servicepoint layer with a 1-M relationship with CustomerInfo table.
Popup in the MapViewer works great, and I can view the related CustomerInfo.
But this does not work when I use the webmap in Collector!
The Popup of the servicepoint in Collector does not give me the option to "Show related data".
So in the field, I am not able to provide them data about the customers,.....
Collector 10.4.2 Build 1559 on iOS.