To manage users and computers, you’ll want to configure the administrative template policies. These policies provide easy access to registry-based policy settings that control the operating system, Windows components, and programs. Although earlier versions of Windows that support Group Policy use Administrative Template (.ADM) files with a proprietary markup language to store registry-based policy settings, Windows Vista uses a standards-based Extensible Markup Language (XML) file format called ADMX. Unlike .ADM files, which are stored in the GPO to which they relate, .ADMX files are stored in a central repository. In domains, central storage of .ADMX files makes them easier to work with and manage.