This article discusses the behavior that occurs if you configure a Windows Vista-based
or Windows Server 2008-based computer for loopback processing. In this case, the computer
needs at least the Read permission for Group Policy Objects (GPOs) in Active Directory Domain Services (AD DS).
If a Windows Vista-based or Windows Server 2008-based computer is
configured for loopback processing, the computer does not receive any settings
from GPOs in AD DS. To read the attributes of the GPOs, the computer needs at least the Read
permission for the GPOs.