http://blogs.technet.com/migreene/archive/2007/02/28/schema-extensions-for-windows-vista.aspxThere are two available schema extensions for Vista. One is to enable a central recovery solution for BitLocker and the other is for configuration of network authentication. Details below. Configuring Active Directory to Back up Windows BitLocker Driveen-USCommunityServer 2.1 SP1 (Build: 61025.2)