Is this your client?
https://www-secure.symantec.com/connect/forums/res...

I think so, as the wording looks very familiar.  When did he send this?

Oh, I see that he sent it today...Must be him...

Well Tony, what's your take on this?

Hi Gianni,

I have experienced this problem before, bellow was my resolution:

Problem: Enterprise Vault Default Upgrade Group does not appear after an upgrade

Synopsis: SIS DB has not been created

Solution:

 Create a permanent vault store group:

-Right click vault store groups select new vault store group àName this as the Upgrade Group that you would like to use for future use e.g. mailbox vault store group

N.B* by creating this vault store group a SIS DB will be created

Create a temp vault store:

-Right click the newly created vault store group select new vault store

-Assign a temp name to the vault store as further into the solution we will delete this vault store e.g. temp vault store

Create a temp vault store partition:

-Right click the newly created vault store select new vault store partition

-Assign a temp name to the vault store partition as further into the solution we will delete this vault store e.g. temp vault store partition

SQL Changes:

-Depending on the SQL version in use open up SQL Enterprise Manger for SQL 2000 or System Manager for SQL 2005

-locate to the Vault store table within the Directory DB

-Open up the vault store table and compare the SISBoundry Column for the newly created vault store and the previously created vault store

-Edit the value for the  previously created vault store so that they appear exactly as the newly created vault store.

Restart Admin Services:

-Open the services snapin within MMC àRight click Enterprise Vault Admin Service and select restart

Delete temp vault store partition and temp vault store group:

                -Under the Temp Vault Store right click the temp Vault Store and select delete

                -Under the newly created Vault Store Group right click the temp Vault Store and select delete