Begins a task for appointment enumeration in a calendar folder to find the appointments that need rebasing.
[in] Optional. A pointer to a rebase task progress function to receive progress. PFNREBASETASKPROGRESS is defined in tzmovelib.h.
[out] Required. A pointer to a pointer to the returned context. This context will be passed to IOlkApptRebaser::EndEnumerateAppointments.
S_OK if the call succeeded; otherwise, an error code.
This task runs on a new thread.