You could exmerge or Outlook it out to a pst file and just re-import the PST into new account.
<a href=”http://www.myithelpdesk.com “>IT Support Sydney </a>
<a href=”http://www.mailprotector.com.au “Spam Filter for Exchange </a>
From Exchange, right click the old mailbox and re-associate it with the new account.
Have a good one.