Choosing Which Sent Items Folder To Use

Running Outlook 2000 (corporate/workgroup version setup) that connects to Exchange 5.5.

New email sits in the the users Mailbox until they move it their Personal Folders. When users send email, a copy is saved in the Sent Items folder in the Mailbox.

I’m sure a few of my users will not want to manually move the sent items to their personal folders.
Is there a way to configure Outlook so that copies of sent mail will be saved in the Sent Items folder in the Personal Folders automaticallyinstead of the Mailbox?

Thanks in advance for your help.