Note This output is not visible when you install Active Directory Domain Services (AD DS) by using Server Manager, and the output is not logged.
Gpprep adds cross-domain planning functionality for Group Policy and Resultant Set of Policy (RSoP) planning mode. This requires updating the file system in SYSVOL and Active Directory permissions for existing group policies. If the environment already contains custom or delegated permissions that were put in place manually by administrators, Gpprep triggers replication of all Group Policy files in SYSVOL and may deny RSOP functionality to delegated users until their permissions are re-created by administrators.
The Adprep.exe tool is included on the Windows Server 2012 media at \support\adprep. This version of Adprep.exe supports remote preparation and does not have to run on the infrastructure master operations master (also known as flexible single master operations or FSMO) role, as it did in previous server operating systems.
For more information about legacy Adprep.exe commands, go to the following Microsoft TechNet website:
Article ID: 2737129 - Last Review: Oct 2, 2012 - Revision: 1