Begins a task for appointment enumeration in a calendar folder to find out the appointments that need rebasing.
[in] Optional. Pointer to a rebase task progress function to receive progress. PFNREBASETASKPROGRESS is defined in tzmovelib.h.
[out] Required. Pointer to a pointer to the returned context. This context will be passed to EndEnumerateAppointments.
The function call is successful.
This task runs on a new thread.