We have a service published in AGOL so we can use it in Collector (10.3). Collecting and editing features via online works fine but trying to sync features (points or lines) collected in offline mode (with or without attachments) it fails the communication with the sever (messages attached).
Some things were tried such as restart service, service only 1 type of geometry, tried to sync only 1 feature, Collector 10.3.7 running on Android 5.1.1 (device Samsung) and Windows 10...
We have AGS (10.3) and SDE stored in MS SQL Server 2008 R2.
Features have global IDs, are registered as versioned, no archiving enabled neither editor tracking.
Have contacted 2 consultants at Esri Portugal who are enrolled with our project but they could not find the problem.
Russell Roberts found in GeoNet you could help people with Collector issues, do you have some suggestion for this? Thanks in advance,