If you run a Mac server, check your Mac App Store updates: OS X Server 2.2.1 has arrived, bringing a panoply of new features and bug fixes.
Headlining is a new feature called Caching Server, which Apple claims will speed up Mac App Store downloads. Although the exact mechanism isn’t stated, it’s easy to imagine that what will happen is if one Mac connected to the server downloads an update, it’ll be cached locally for other Macs to download instantly.
There’s also a monitoring service for Time Machine, telling admins which Macs have backed themselves up and when. Wiki Server support for Retina MacBook Pros and a new Centralized Certificate Management interface are also new.
You can download OS X Server for any Mac running Mountain Lion at the link below.