Displays the highest committed Update Sequence Number (USN) that the targeted DC's copy of Active Directory shows as committed ...

Displays the highest committed Update Sequence Number (USN)
     that the targeted DC's copy of Active Directory shows as committed
     for itself and its transitive partners.
     
     The up-to-dateness vector (UTDVEC) shows the highest USN that the 
     destination DC has seen via replication in the form of changes it 
     has received from its direct and transitive replication partners 
     for the selected partition.

     Destination DC's request changes starting with the last received 
     USNchanged from a given source.

     All USN numbers for a given source DC appear in the context of the local 
     USN for that source not the USN numbers on the destination DC. 

     The UTDvec for a local machine shows the highest committed USN that the
     DC's has inbound replicated or originated.

     /SHOWUTDVEC output lists current and historical replication partners, 
     including transitive replication partners. 

     By comparing the USN values from /SHOWUTDVEC on a source and destination 
     domain controller, you can determine how up-to-date a destination DC is 
     with it source partners.

     USN Rollbacks may also be detected if /SHOWUTDVEC is run when the
     destination DC has a higher committed USN than the source DC 
  
     Obtain /SHOWUTDEV from destination DC's immediately followed by source DC's
     for best results and to avoid false USN Rollbacks.

     [SYNTAX]
     
     /showutdvec   [/nocache] [/latency]

      Enter the DN path of the desired directory partition.
 
     /nocache Disables translation of DC GUID to friendly name.

     /latency - orders the entries in the UTDVEC from least current to most 
             current.
     

     [EXAMPLES]

     repadmin /showutdvec dc=contoso,dc=com

     repadmin /showudvec dc=mayberry,dc=contoso,dc=com /latency