OS X Server 2.2.1 has arrived in the Mac App Store, bringing with it a variety of new features and bug fixes. The $20 "server for everyone," which users install atop Mountain Lion, received the following updates:
Newly added is a Caching Server, which Apple says will speed up downloads for software from the Mac App Store--presumably by not requiring that connected Macs all re-download the same apps anew. Also new is a monitoring service for Time Machine, which logs which Macs have backed up, when they did so, and how large those backups are. There's a new Centralized Certificate management interface. And Wiki Server gains support for the MacBook Pro with Retina display, too.
Bug fixes abound: Issues with deleting apps uploaded to Profile Manager, setup failures because of SSL errors, and problems upgrading from Lion Server are all addressed. Administrators can now also create Active Directory groups within Profile Manager.
The update also addresses a trio of security vulnerabilities that could allow arbitrary code execution.