I am creating a Collector app with two related tables: Camera and Camera Checks. They have a one to many relationship (one camera can be checked many times). I have used a GUID called CameraID that is indexed as my related field. I have created these tables in ArcMap for Desktop and then published them as a service along with other tables to AGOL. When I am in Collector I can add a camera and check that camera without a problem. However, Collector does not automatically populate my GUID field in either table. Is there a way to set up the app so this will automatically populate? Otherwise I'm not sure when looking at a camera check in the Camera Check table which Camera that it is associated with.