When some programs running on workstations genuinely encrypt files on a file server (as Lacerte tax program does), CryptoGuard catches the activity as a ransomware attack.

Currently there is no mechanism to exclude files or folders from Ransomware scanning, so it is impossible to have CryptoGuard enabled on those servers.

While workstations are also running CryptoGuard and could catch ransomware at that level, having the server unprotected is not really a solution as other workstations with no Sophos installed could potentially encrypt server files.

Excluding specific folders and letting CryptoGuard continue to protect the server for all other folders would be a more secure solution.