Alright so you have already deployed Windows Mobile devices in your Exchange Server 2003 mobile messaging environment, and now you have one user after the other contacting the IT department with all sorts of device related issues (who said certificates 
) If you can say yes to this you might want to have a closer look a Pocket Controller-Enterprise from SOTI inc. This brilliant product makes it, among many other things, possible to remote the Windows Mobile devices in your organization from a desktop PC (even over GPRS!).
Is that cool or what? 