If you are already running an existing KMS Service within your environment, and you do not plan to install a new KMS Service, the following information might be of interest if you have plans for deploying Windows 7 or Server 2008-R2 systems.
Update for Windows Server 2003 (KB968915)
http://www.microsoft.com/downloads/details.aspx?FamilyID=f3a0d90c-b7fd-44cf-bf81-11587adc599f&displaylang=en
Update for Windows Server 2003 x64 Edition (KB968915)
http://www.microsoft.com/downloads/details.aspx?FamilyID=1678151b-b577-476f-87da-df54024b98e2&displaylang=en
An update is available that installs Key Management Service (KMS) 1.2 for Windows Server 2003 Service Pack 1 (SP1) and for later versions of Windows Server 2003
http://support.microsoft.com/?kbid=968915
This update installs Key Management Service (KMS) 1.2 for Windows Server 2003 Service Pack 1 (SP1) and for later versions of Windows Server 2003. KMS 1.2 provides support for the following KMS client installations:
· Windows Server 2008 R2
· Windows Server 2008 and Windows Server 2008 Service Pack 2 (SP2)
· Windows 7
· Windows Vista and Windows Vista Service Pack 2 (SP2)