Error message when you access a share that you pinned by using Always Available Offline: “Access is denied”
When you right-click a shared network folder or a shared network file on a Windows Vista-based computer or on a Windows Server 2008-based computer, and then you click Always Available Offline to pin the network resource, you cannot access the shared file or folder. This problem occurs if only part of the network resource is cached. Additionally, you receive an error message that resembles the following:
Access is denied.
If you synchronize the file or the folder, the synchronization operation is successful. However, you still cannot access the file or the folder.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB957772.