gpresult
Gpresult is a command-line tool that shows the Resultant Set of Policy (RSoP) for a user or computer based on applied Group Policy settings. It ships with all versions of Windows, including Windows XP, Windows 7, Windows Server 2003 and Windows Server 2008.
By running gpresult.exe, an administrator can find a full list of Group Policy Objects in use, as well as redirected folders, applied registry settings and other details about a given system.