I have a iPhone user were everthing is working well with the exception of

The issue is that appointments go to the device and then disappear. Not all
the time but rather it appears, appointments created by a proxy user in GW
that has proxy to their boss's account, sent an appointment to that iPhone
user. The appointment goes to device but within few moments, the
appointment will disappear from the device (it stays on the desktop GW

Selecting re-sync or re-inititialize has no effect.

This user recently switched from a Blackberry (BES) to an iPhone and has
never had this issue before (on the Blackberry) until after switching to an