Rivaldi The best way is to call the app team. Short of that, if the messenger service is not turned off, you can run nbtstat -A <app server IP> to see who's on the Windows box. If you can access the box, check Event Viewer security to see who logged on some time before v$session.logon_time. Client machine name? It's v$session.machine or terminal. Yong Huang > If a user access a database thru application reside in application server, > osuser in v$session is NETWORK?SERVICE. Is there a way to find who is the > true / actual user for NETWORK?SERVICE osuser (or user client machine name) -- //www.freelists.org/webpage/oracle-l