The ReplyTime property returns or sets the date/time a recipient replies to the meeting request associated with this appointment. Read/write.
objAppointment.ReplyTime
Variant (vbDate format)
The ReplyTime property is not meaningful on the original AppointmentItem object held in the calendar folder of the meeting's Organizer. Instead, ReplyTime is used on the AppointmentItem object created in the calendar folder of each meeting request recipient that calls Respond with a parameter of either CdoResponseAccepted or CdoResponseTentative. The recipient can access the associated appointment with the MeetingItem object's GetAssociatedAppointment method.
The ReplyTime property does not have a default value. If you attempt to read it when it has never been set, it returns CdoE_NOT_FOUND. The current version of CDO does not set ReplyTime, so your application should set it when you reply to the meeting request:
Dim objMtgReq As MeetingItem ' received meeting request
Dim objMtgRsp As MeetingItem ' response to meeting request
Dim objAssocAppt As AppointmentItem ' associated appointment
Set objMtgRsp = objMtgReq.Respond(CdoResponseAccepted)
Set objAssocAppt = objMtgRsp.GetAssociatedAppointment
objAssocAppt.ReplyTime = Now ' log response time
objMtgRsp.Send ' saves a copy of the response by default
Changes you make to properties on an AppointmentItem object take effect when you call the Send or Update method.