2.12.1 PidTagOfflineAddressBookContainerGuid

 The PidTagOfflineAddressBookContainerGuid property ([MS-OXPROPS] section 2.806) contains a GUID that identifies a set of full and differential OAL files that form a complete OAL, ordered by their OAL data sequence numbers, as specified by the PidTagOfflineAddressBookSequence property in section 2.12.4. A server MUST set this property to the same value for every full and differential OAB message in a sequence, but the server MUST set this to a different value for unrelated sequences of files.