After reading: http://www.msexchange.org/tutorials/Shared_Hosting_Exchange_2003_Part1.html and http://www.msexchange.org/tutorials/Shared-Hosting-Exchange-2003-Part2.html and configuring our server as described - All features are working except OMA with Pocket PC. We have Installed SSL Certificates on the PPC. We are able to authenticate OMA from workstations but not thru PPC. We are also able to authenicate to OWA as well as RPC over HTTP with OUTLOOK. When trying to access with our PPC without SSL enabled we get HTTP_403 and with SSL ENABLED we get HTTP_401 error. Anyone else have this issue?