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Attributes for Exchange 5.5 Mailboxes :  Object-Version

Object-Version is a value that indicates how often the mailbox object was changed due to operations in the local database or received replication cycles from other Exchange servers.


LDAP name Object-Version
Data type Integer
Multivalue (Array) No
Heuristic 12 => Replicated between sites, operational attribute
Access category

System access only

Ex55 Database name Object-Version

This value is neccessary for the internal control of the incremental replication. It can only be changed by the system itself.

In this context, there are some other important attributes existing: USN-Source, USN-Changed and USN-Created. With the normal attribute tabs in the Exchange admin tool, these attributes are not visible.

The NT-Security-Descriptor attribute is an operational attribute which is not automatically retrieved by a GetObject() or an GetInfo() call. You can load such attributes into the object property cache by explicitly calling GetInfoEx(). Read more about this technique in the topic 'Reading object attributes' here in the SelfADSI tutorial.