Sometimes it can be useful to know what Exchange Server is associated with what user according to Enterprise Vault and the information in the Enterprise Vault Directory Database. So for example is UserA referencing the new Exchange Server that he/she has been moved to?
This can simply be done by running the following view in the Directory Database (At least in Enterprise Vault 8).
You can run more advanced queries against this view if you require of course and you can identify the Exchange server from the "ExchangeServerIdentity" column and then cross referencing this with the ExchangeServerEntry table.
Alternately you could run the following query against the Enterprise Vault Directory Database.
Select * from ExchangeServerEntry where ExchangeServerIdentity = 'number found in view'