Protecting Sensitive Data with AD RMS.
The beauty of Active Directory Rights Management Services is the way it spans across a range of Microsoft products. Companies that leverage the Windows client, Windows Server, and the Office productivity suite, but also Exchange Server 2010 can also seamlessly take advantage of AD RMS in order to ensure that their data is safeguarded. Of course Windows Server is the core component, which provides Active Directory and the associated Rights Management capabilities.
Source - Protecting Sensitive Data with AD RMS - Via Windows Server 2008 and Windows Server 2008 R2 - Softpedia