That's what I found on EV support site.

Changing the mailbox to which Enterprise Vault connects:

A good diagnostic step is to change the mailbox Enterprise Vault uses to
connect to the Exchange System to an existing mailbox that you know does not
have any issues.

You can alter the mailbox by running a SQL script as follows:

1. Stop all the Services dealing with this particular Exchange Server
(Archiving, Retrieval etc)

2. Log in SQL Query Analyser and paste the script below into the Query
Window

3. Alter @@connectto and @@ExchangeServer variables as appropriate for your
system

4. Press to execute the script

5. Restart the services you stopped in the first step

================================================== ==========================
=========

declare @@connectto as varchar(100)
declare @@ExchangeServer as varchar(100)

--Alter these two values as appropriate
set @@connectto = 'EnterpriseVault-EVDEMO@kvs.local'
set @@ExchangeServer = 'EVDEMO'

USE EnterpriseVaultDirectory
Update ArchivingServiceEntry set SystemMailbox=@@ConnectTo where
ExchangeServer=@@ExchangeServer
Update RetrievalServiceEntry set SystemMailbox=@@ConnectTo where
ExchangeServer=@@ExchangeServer
Update JournalingServiceEntry set SystemMailbox=@@ConnectTo where
ExchangeServer=@@ExchangeServer
Update PublicFolderServiceEntry set SystemMailbox=@@ConnectTo where
ExchangeServer=@@ExchangeServer
"Andrew" wrote in message news:42c27eb0@ROSASTDMZ05....
> I create an archiving service and specify a mailbox during the creating
the
> service. I would like to change it into another mailbox now. How can I do
> this? thanks.
>
>