With the release of Windows Server 2008 R2, Microsoft released a Windows PowerShell module for managing Active Directory. To be able to use the PowerShell module you must have at least one domain controller running Windows Server 2008 R2, or at least one domain controller running Windows Server 2003 or Windows Server 2008 with the Active Directory Management Gateway Service installed. The PowerShell module is also available in Windows 7 as part of the Remote Server Administration Tools (RSAT).