Configure OMA in Exchange 2003
Exchange Server 2003 enables any device capable of running the Windows Mobile 2002 or later, such as browser-enabled cell phones or Windows Mobile–based Personal Digital Assistants (PDAs) to access corporate Exchange information. All changes made on the wireless device are reflected in the live mailbox and can be seen from a full desktop mail client such as Outlook 2003 or Outlook Web Access (OWA).