We have recently installed a new Exchange 2007 Server. All our iphones are connecting fine with the new Server, but none of our HTC's can seem to connect, with the error "the server you are trying to synchronize with is not an exchange server or is running incompatible software..."
Activesync is set up exactly as before, with email address, user name, password, domain and External IP address (outside edge of router. All port forwards are set-up as they were for our old 2003 Exchange Server.
We are not using an SSL, but don't need one for it to work anyway (as far as I'm aware).
Our old 2003 Exchange server worked fine.
Any ideas ???