You can add your ArcGIS Server services as items with your ArcGIS organization. The backend for your organization can be ArcGIS Online or your own deployment of Portal for ArcGIS. The item references the service URL and provides basic metadata about the services. Adding your services to your organization helps others discover, consume, and share your services.
You can connect ArcGIS Server Manager or ArcGIS for Desktop to your ArcGIS organization. Once you do this, you'll see additional sharing options at the time you publish or edit a service. These options allow you to add the service as an item in your ArcGIS organization.
For full instructions, see the topics below.