I have an HTC HD mini running Windows Mobile 6.5. I have been able to sync Outlook to the Exchange
Server in the past but today I cannot.
I receive the following error message.
The security certificate on the server is not valid. Contact your Exchange Server administrator or
ISP to install a valid certificate on the server.
Support code: 0x80072F0D
The exchange server is functioning correctly, and users running iPhone and Android can sync.