Administrators can configure OfficeScan to defer the scanning of files. OfficeScan allows the user to copy files and then scans the files after the copy process completes. This deferred scanning improves the performance of the copy and scan processes.
Deferred scanning requires that the Virus Scan Engine (VSAPI) be version 9.713 or later. For details on upgrading the server, see Manually Updating the OfficeScan Server.