Synching contacts in Outlook from two different Exchange mailboxes.

I have a user with two different Exchange 2003 mailboxes.  The first is for and the second is for  The first is associated with a user account named and the second is for  The reason for this is to not put both email addresses under one user account.  We separated the mailboxes, and when he wants to access either one, he reopens Outlook to access the other one.  

What he wants is that when he creates a contact in the mailbox, that the contact list is updated in the mailbox.  I told him that we could do a weekly PST export from and import them into  But, that requires some manual, so I'm trying to find a way to synch them up automatically.  

He's using Outlook 2007 on an Exchange 2003 mailbox.
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NavdeepConnect With a Mentor Commented:

Check this option of Shared Contacts. That may help in this situation
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