By default, the Software Update Service, long a part of OS X Server, is hidden. This indicates the service is not likely to be long for this world. However, many an organization still likes to leverage cooling off periods for their Mac fleet. To see the service, once you’ve installed the Server app, open the Server app and then from the View menu, select Software Update.
You’ll then see the Software Update service. If you click off of the service and close the app, it will be hidden again. If you enable the service, you will then see it each time you open the Server app. We’ll get into enabling the Software Update service in a bit.
Enjoy.
