2.2.4.3 PidLidAppointmentReplyTime Property
Type: PtypTime ([MS-OXCDATA] section 2.11.1)
The value of the PidLidAppointmentReplyTime property ([MS-OXPROPS] section 2.24) on the attendee's Meeting object specifies the date and time at which the attendee responded to a received Meeting Request object or Meeting Update object. The value is specified in UTC.