Me and my co-workers recently ran into an issue with our iPhones. All of a sudden the camera icon dissappeared and it required a hard reset to get it back. At least that is what we thought. When i set up my Exchange account in the iPhone, the camera icon dissappeared again. It turned out to be our Exchange server that caused this behaviour. A couple of weeks ago we upgraded our Exchange environment to Exchange 2007. In Exchange ActiveSync it is possible to set policys for the connecting devices. One of the policies allows the use of the camera and this is disabled in the default policy.