I've got a user with a phantom appointment reminder dialog box. The symptom is that during the day, it doesn't seem to be at any one specific time, a dialog box will appear to appear... Meaning I can see the title in the start menu program tray but if I click it the dialog box doesn't become visible. I can right click the minimized program title and select close, but nothing happens. I've checked, there are not appointments in the user's calendar around this time. It happens daily. The only way to make it go away is to shutdown outlook. I've minimized everything down to the desktop to see if it was hiding behind another window.