220.127.116.11 Replying to a Post Object
When the user replies to a bulletin board post, the client creates a new Post object in the same way it creates any Message object, as specified in [MS-OXCMSG] section 18.104.22.168. The new Post object is created in the same Folder object that contains the original Post object. The PidTagConversationTopic property (section 22.214.171.124) of the new Post object MUST be copied from the original Post object. The PidTagConversationIndex property (section 126.96.36.199) of the new Post object is set to a value that is updated from the PidTagConversationIndex property of the original Post object. For details about setting properties and copying properties, see [MS-OXCPRPT].