2.12.4 PidTagOfflineAddressBookSequence

 The PidTagOfflineAddressBookSequence property ([MS-OXPROPS] section 2.819) contains the OAL data sequence number of the attached full or differential OAL files.

An integer that is associated with offline address list (OAL) data that represents the generation number of this data. The value of the initial sequence number is "1". Each subsequent data generation process that produces a data set that is not identical to the previous data set is incremented by one.