3.1.4.8.5.1 Deciding to Record the Response
If any one of the following conditions is met, the client does not record the response for the attendee on the organizer's Meeting object:
The Meeting Response object is located in the Sent Items folder or the Outbox folder, as specified in [MS-OXOSFLD] section 2.2.
The value of the PidTagProcessed property (section 2.2.5.7) on the Meeting Response object is set to TRUE.
The client SHOULD NOT<71> record the response for the attendee when the value of the PidLidServerProcessed property (section 2.2.5.4) on the Meeting Response object is set to TRUE and the PidLidServerProcessingActions property (section 2.2.5.5) either does not exist or has the cpsUpdatedCalItem bit of this property set.<72>