Exchange 2003 mailbox creation

have 2 servers with one being a Active Directory controller. I also have Exchange 2003 running on the active directory box. The problem is that when I add a user when logged into the 2nd server it does not create an Exchange mailbox. Obviously when Exchange 2003 was installed on the active directory server it added functionality to the Active Directory for Users and Computers mmc plugin. The second server however only have the standard Windows 2003 server adminpak loaded which enabled it to administer the Active Directory and add/remove users. How do I add the Exchange admin module to my Active Directory for Users and Domains on the second server? Without this I can't add or delete mailboxes. In fact if I try to add a user with a mailbox from this 2nd server it corrupts something and I have to delete and re-create the user on the exchange server.

I figure its on the Install CD somewhere, but if someone could answer this as if I was a total n00b they could get my points.