To setup an email forward for a user within Microsoft Exchange 2007, follow the instructions below:

1) Open Exchange Management Console
2) Expand Recipient Configuration
3) Click Mailbox
4) A list of all mailboxes will be appear in the right hand pane. Right click the mailbox you wish to setup the mail forward on.
5) Click properties
6) Click the mailflow settings tab
7) Double click Delivery Options
8.) Click the check box forward to
9) Browse for the mailbox you wish to forward emails to
10) Click OK to apply settings

Online