When using a domain with AD authentication, users can access all windows file shares with their own (native NTFS) permissions.
When these files are shared with file sharing, access with the shared link is not possible, as the serv-u service account doesn't have access to the file.
Allowing this access to the serv-u service account would create a major security risk (that would be full access to all windows file shares).
So the idea is to copy the shared file to the file sharing directory instead of linking it. At the time the file is shared, the access will happen under the users permission.
This will additionally solve the problem, that the original file needs to stay available at the original location as long as it is shared.
From the windows file share it is not visible if a file is shared with serv-u, so another user might move/delete/rename the original file, breaking the file sharing.
