We have several iPhones deployed at our organization, all of them accessing their Exchange e-mail boxes over the air via push.
One of the iPhones (and of course it belongs to the highest-up) has a unique issue not shared with the others:
When a calendar item is added to the iPhone, it does not get synchronized with Exchange. If an item is added in Exchange, it gets synchronized over the air with the iPhone correctly.
E-mail send/receive works flawlessly, and since other phones are functioning properly I don't believe it's the server.
The user has 4 calendars (really 3) listed on their iPhone: All, Calendar, Home and Outlook Calendar. I don't know how to delete them, but he states that none of them synchronize with Exchange (we assumed Outlook Calendar might, but no dice).
He uses iTunes and a PC, and has upgraded to the latest firmware and iTunes version.
Any suggestions? I'm out of ideas except for a complete wipe of the iPhone which I'd rather not do unless I have to.