Yes, but only on different computers. During parallel operation the users of Sophos SafeGuard have access only to files, which were encrypted by other users with Sophos SafeGuard. They can no longer open files that have been encrypted or edited with conpal LAN Crypt. Vice versa, users of conpal LAN Crypt have access to files encrypted by Sophos SafeGuard users as well as to files encrypted with conpal LAN Crypt. (Precondition is that the keys have been migrated from Sophos SafeGuard to conpal LAN Crypt).