126.96.36.199.3.2 Clearing Previous Responses
If the Meeting object is set to request responses (according to the PidTagResponseRequested property ([MS-OXOMSG] section 188.8.131.52)), and a significant change, as specified in section 184.108.40.206.3.1, has been made, the client SHOULD clear all tallied responses that have been previously received from attendees. The client SHOULD NOT clear the tallied responses if a significant change has not been made or if the Meeting object is not set to request responses.<52>
To clear the tallied responses, the client sets the value of the PidTagRecipientTrackStatus property (section 220.127.116.11.2) to "respNone" (0x00000000) in each RecipientRow structure, as specified in [MS-OXCDATA] section 2.8.3, of the Meeting object, as well as for any RecipientRow structures in the PidLidAppointmentUnsendableRecipients property (section 18.104.22.168) and any recipients (2) listed in the PidLidNonSendToTrackStatus (section 22.214.171.124), PidLidNonSendCcTrackStatus (section 126.96.36.199), and PidLidNonSendBccTrackStatus (section 188.8.131.52) properties. The client also can set the value of the PidTagRecipientTrackStatusTime property (section 184.108.40.206.3) in each RecipientRow structure to an invalid date (for example, 12:18 A.M. 23 October 1602). Changing this value is not required.