BCC (of a sort)

I have a client and we're in the process of bringing mail in-house to run from Exchange.  The owner wants to get copies of e-mail sent to other staff so he can stay on top of things.  In the past he's just included the other accounts as POP3 connections downloading to his inbox.  But as we move to exchange, this doesn't seem to be the best way.  

Is there a way, in Exchange, to automatically forward a copy of a user's e-mail to another e-mail address without otherwise alerting or potentially alerting the user that this is going on.

I've recommended just setting permissions on the mailbox to allow him to open the mailboxes and browse through at will, but he prefers the messages to be included in his inbox.  Another solution I've thought of (not tested) is to enable POP3 and set the other accounts to be POPed to his exchange mailbox, leaving the mail on the server.  The more I think about this the more I think this is the way to go - but if there is a setting I could do to avoid this, that would be better.

(I realize the nebulous nature of this question regardnig privacy, but he is the owner of the company and I believe policies have been announced in the past that otherwise have said your e-mail is NOT private).