You could try setting up a rule for forwarding the e-mail using the Outlook Out of Office assistant. Just select the option to forward all mail to your second e-mail.
Tools -> Out of Office Assistant -> Set an out of office message if you would like -> Click on the Add Rule button -> Mark the Forward to checkbox and input your e-mail.
You are given the option to forward e-mail the standard way, or leave it intact.
Alternatively, If they are running MS Exchange you could ask your exchange/system administrator to setup a forward on your User Account in the Exchange server (User Properties – Exchange General – Delivery Options – Forward to – select your mail enabled contact or other user)
These should work for you.
I hope it helps.
Victor Cavendish Góes