UserBoss wants to receive a copy of all incoming mail of UserEmployee.
So I went into UserEmployee's mailbox properties (Exchange 2003) and on the Exchange General Tab - clicked Delivery Options. In delivery options I checked Forward To: and selected UserBoss's account name. I also checked the box Deliver messages to both forwarding address and mailbox.
I then created a rule on UserBoss's computer(Outlook 2003) so that all these forwarded copies coming in addressed to UserEmployee will be moved into the folder UserEmployee to keep the email organized.
So - all that works great except when UserEmployee sends an email to a bad email address. UserEmployee will receive a NDR as usual but UserBoss receives one addressed to UserBoss@mycompany.com and it therefore stays in UserBoss's inbox. I don't understand why the NDR would come in to UserBoss addressed to UserBoss. If it worked like all the other email coming in, it would come in addressed to UserEmployee and be moved to the folder UserEmployee.