Hello, I have installed Exchange 2007 to a Windows Server 2003, however for some reason, when I go to active directory and I select a user, there is no option on right click to create them a mail box. I can create them one in Exchange, so clearly there is some sort of link between Active Directory and Exchange. Have I not selected a option correctly? Or is it something else? Suggestions would be greatly appreciated.

With Exchange 2007 the mailbox management is no longer done from AD, it had been given back to Exchange. Creating Mailboxes for user is now done from either Exchange Management Console / Mailboxes or from the Exchange Management Sell using the new-mailbox or enable-mailbox cmdlets.