Cancels callbacks for an offline object.
[in] Flags for canceling callback. Only the value MAPIOFFLINE_UNADVISE_DEFAULT is supported.
[in] An advise token that identifies the callback registration that is to be canceled.
Removes the registration for the callback that was associated with ulAdviseToken returned from a prior call to IMAPIOfflineMgr::Advise. Causes the IMAPIOfflineMgr object to release its reference on the IMAPIOfflineNotify object associated with ulAdviseToken.
The call was successful. This call must return S_OK.