220.127.116.11 PidLidNonSendableCc Property
The PidLidNonSendableCc property ([MS-OXPROPS] section 2.178) contains a list of all the unsendable attendees who are also optional attendees. The value for each attendee is the PidTagDisplayName property ([MS-OXCFOLD] section 18.104.22.168.2.5) of the attendee's Address Book object. Separate entries are delimited by a semicolon followed by a space. This property is not required.