http://blogs.technet.com/yungchou/archive/2008/06/17/porting-documents-form-irm-enabled-sharepoint-document-library-in-groove-workspace.aspxWindows Server 2008 has Rights Management Services (RMS, which is a server add-on feature) as an installable role and seamlessly integrated into the OS. Further Information Rights Management (IRM, which is the client ability to comply with what is seten-USCommunityServer 2.1 SP1 (Build: 61025.2)