title: EWS: copy items between mailboxes/accounts
body: <p>If my app has the credentials of two users, user A and user B, whose accounts/mailboxes are on the same Exchange server, is there a way that I can copy an item (e.g. an email) from a folder in user A's mailbox to one in user B's, and keep the traffic local to the Exchange server?</p>
  
  <p>Neither user would have delegated/granted access to the other, and I'd prefer not to have to do this via a public folder.</p>