If this call log was, at any time during the call, a conference, this property represents those participants who were in that conference leg of the call. ConferenceRemoteParticipants represents a subset of all RemoteParticipants in all CallLogItems represented in CallEvents as well as those in the top level CallLogItem.

public ReadOnlyCollection<CallLogParticipant> ConferenceRemoteParticipants { get; }