It would be very use to have a round trip function from a SharePoint list to ArcGIS Webpart to Collector and then back to update the original list. i.e.:
We started with a SharePoint List that was not mapped. Then added long and lat columns to add to ArcGIS for SharePoint Web Part. So the web part updates when an item is added to the SharePoint list. The Web Part can export the layer as a hosted feature layer. But if we have an Inspector who would use the layer in Collector, I don't see how to update the SharePoint List. It seems like one way communication.###ESRIMapsForSharePoint.