Connecting iPhone 4 to Exchange Server 2003 Account

Problems in connecting the iPhone 4 to Exchange Server 2003.

A) Cannot verify with the certificate. Got message: "Cannot verify server identity"

B) Cannot connect to the server. Got message: "The connection to the server failed"

Solved the problem of authentication by installing the root cert of mail server (used by the OWA) to the iPhone.

Authentication passed but still cannot connect to the server to receive mail.

Finally find the solution from http://discussions.apple.com/thread.jspa?threadID=1771264&start=0&tstart=0

With these steps:

1) Follow this Microsoft KB article: http://support.microsoft.com/?kbid=817379

SSL does not play nice with Active Sync. This provides the work around.

2) There is another issue that causes this problem. If you use OWA with forms based authentication, activesync will not work. Here is the fix: Install a hotfix: http://support.microsoft.com/kb/916640

This allows Push mail to resume after the SSL Active Sync work around has been evoked.

Mail box and outlook items can then be synchronized properly.