2.2.1.9.2 PidLidContactLinkGlobalAddressListLinkId Property
Type: PtypGuid ([MS-OXCDATA] section 2.11.1)
The PidLidContactLinkGlobalAddressListLinkId property ([MS-OXPROPS] section 2.71) specifies the GUID of the GAL contact to which the duplicate contact is linked.<7>