I am trying to sync a Android Motorola Atrix phone with Microsoft Exchange 2003 and I am having no luck. We do not have a certificate on the server. OWA on the server is fully operational. To make OWA work you need to put the full public IP address /exchange as an address for the browser and that gets you in to Outlook Web Access so I don't believe it is security issue. I either get the message that it cannot connect to the server or a HTTP error 403 message. Any help would be appreciated.