If you want to redirect the Documents folder and other knownfolders on Windows 7 computers to a network-attached storage (NAS) device, you should first ensure that:
The NAS device supports Oplock
Share permissions are configured so that Everyone has Change permission
You’ve applied the following two hotfixes to your Windows 7 computers:
Mitch Tulloch is an eight-time recipient of the Microsoft Most Valuable Professional (MVP) award and a widely recognized expert on Windows administration, deployment and virtualization. For more information see http://www.mtit.com