Outlook 2000 deletes fwd’d msgs fm Inbox

I have a group of computers, Dell Optiplex GX110’s (PIII-677, 128M RAM). Office 2000 with SR-1 have been installed. In Outlook, on only one of the computers, when a message is forwarded, it is deleted from the Inbox, but it does save it in the SentItems box. Office 2K has been completely uninstalled and reinstalled. No change. Have been thru the options, but see nothing pertaining to this. Any ideas? Suggestions?
Thanks Terry