Reset Offline Files Cache in Windows 7

Easiest way to do this:

1. Navigate to the following location in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Csc\Parameters 

2. Create a new DWORDValue called FormatDatabase , with the value 1
3. Reboot (the new key we created will delete itself after rebooting along with the Offline cache)

You can then set the network resource to always be available offline again, and it will begin the synchronization.