If you used Folder Redirection, and the redirected folder is available offline, you could experience the following:
If you right-click the redirected folder and press Properties, the target listed is the old network location. Synchronization of changes made while offline will fail with:
Offline Files (\\ServerNmae\share on ServerName): Unable to connect to '\\ServerName\share.' The network name cannot be found.
This occurs because the original network version of the redirected folder is not available to synchronize the changes made before redirection was performed.
To fix the problem, you must make the original network location available. When the offline files are synchronized, the folder can be redirected.
If you can't make the original network location available, perform an Offline Files reset.