I am mapping a sewer utility by first using collector and AGOL map to field locate the manholes first. I want to add in sewer pipes in on ArcGIS for Desktop to creat my sewer network. How do I edit my AGOL map in ArcGIS for Desktop? When I connect to my AGOL map and try to edit it, it says it wont allow editing. Is there a setting i missed somewhere?
You should publish a map document to AGOL with your pipes and then add that layer to your AGOL map used in collector.
Check out the Help article "About editing data from feature services". You basically make a local copy of the data in ArcMap, make your edits, and then sync back to the service.