18.104.22.168 PidTagRecordKey Property
Type: PtypBinary ([MS-OXCDATA] section 2.11.1)
The PidTagRecordKey property ([MS-OXPROPS] section 2.982) contains a unique binary-comparable identifier for a specific object. Whenever a copy of an object is created, the server generates a new identifier for the copied object. This property does not apply to Folder objects and Logon objects. This property is read-only for the client.