You can enable offline viewing and editing of feature layers in your ArcGIS Enterprise portal. To take feature data offline from an ArcGIS Enterprise portal, you must enable sync on the feature layer and add the sync-enabled feature layer (or layers) to a map that is enabled for offline use.
Enable a hosted feature layer for offline mapping
If you enable offline editing (sync) from ArcGIS Pro or ArcMap when you publish a hosted feature layer to your portal, the data is automatically configured to allow synchronization to occur. If you publish a hosted feature layer from a file in your portal, enable sync from the Settings tab of the hosted feature layer's details page. See Manage hosted feature layers for instructions.
Enable an ArcGIS Server feature layer for offline mapping
Before you can enable an ArcGIS Server feature layer for offline mapping, you must prepare the source data. See Prepare data for offline use in the ArcGIS Server help for details.