Apple Insider posted a story that Apple on Thursday released OS X Server v2.2 for Mountain Lion, bringing a new Caching service and numerous bug fixes to its server software for Mac.

From the release notes:

Caching service

Introduces a new feature called the Caching service, which speeds up the download of software distributed by Apple through the Mac App Store. It caches both software updates and purchased apps from the Mac App Store. For more information about the Caching service, choose Server Help in the Help menu.

Server app

Addresses an issue in which attempting to change the blacklist server used by the Mail service might not work.
Includes general enhancements.


Adaptive Firewall

Addresses an issue that caused an exception to be raised when using the hb_summary tool.
Calendar service
Addresses an issue in which Calendar invitations were always sent in English.
Includes general enhancements.


Mail service

Addresses an issue in which freshclam and clamav do not provide logs about upgraded systems.
Resolves an issue in which the quota hard limit was not being respected.
Addresses an issue in which certain settings weren’t maintained when upgrading from a previous version of OS X Server.


Contacts service

Corrects an issue in which under certain circumstances, the service would not start when using a non-default location for the data store.
Adds the ability to search for records containing non-English characters.


Messages service

Resolves an issue where under certain circumstances, the service would not start when using a non-default location for the data store.


Profile Manager

Adds the ability to use Active Directory groups with Profile Manager.
Adds the ability to delete apps uploaded to Profile Manager.
Includes performance and other general enhancements.

  OS X Server updated with new Caching service and bug fixes