please see below thread
https://www-secure.symantec.com/connect/articles/installing-dlp-endpoint-agent-altirishttps://www-secure.symantec.com/connect/forums/how-install-dlp-agent-client-machines
https://www-secure.symantec.com/connect/forums/verify-dlp-agent-installation#comment-7127101
https://www-secure.symantec.com/connect/forums/how-install-symantec-dlp-agent-using-logon-script-or-startup-script