Mastering Active Directory

The up-to-dateness vector table

The up-to-dateness vector (UTDV) table is maintained locally by each domain controller to prevent unneeded replications. UTDV also per naming context and each domain controller has a minimum of three UTDV tables. The UTDV table contains the highest UPN value it learned from any connected domain controller per NC basis. This will prevent domain controllers from replicating the same changes over and over. For example, if a domain controller A received a domain NC from domain controller B, it will update the UTDV table and update the UPN value for it. Based on that, it will not retrieve the same update from the other connected domain controllers. Because of UTDV, domain controllers will not send any data to their ...