AppointmentItem.ConversationID Property (Outlook)
Office 2013
Published: July 16, 2012
Returns a String that uniquely identifies a Conversation object that the AppointmentItem object belongs to. Read-only.
This property associates items with a conversation. These items and the conversation all have the same value in their ConversationID property.
This property corresponds with the MAPI property PidTagConversationId.
If the AppointmentItem object is created in a version of Microsoft Outlook earlier than Microsoft Outlook 2010, or if Outlook is running in online mode against a version of Microsoft Exchange Server earlier than Microsoft Exchange Server 2010, this property returns the same value as the ConversationTopic property.