Support for Windows XP SP2 and Windows 2000 ends on July 13, 2010
As the title says, Windows XP SP2, Windows 2000 Server and Windows 2000 Professional are reaching End of Support (EOS) on July 13, 2010 (and Windows Vista RTM End of Support is on April 13, 2010). This means that regular Microsoft support and free access to security updates will come to an end for those products on those dates.
The Mobile Device Manager Support Team Blog : Support for Windows XP SP2 and Windows 2000 ends on July 13, 2010