Editing Internal Layers

Discussion created by rvernagus on Jun 3, 2011
Latest reply on Apr 12, 2015 by AthinaPB
When I point the ArcGIS Online Map Viewer at a MapService on our internal network, I get the following message:
Layer 'MyService - MyLayer'
seems to be on an internal network and is not accessible to ArcGIS.com. Thus, editing will be disabled on this layer.

Is there a technical reason why editing is disabled? Is there any way to enable editing of internal layers?