EV Delete Stubs from Mailboxes

Hello All

We are using EV 10.0.3 for Exchange (2003).

We are in the process of de-integrating one of our businesses from our network and they will not be using EV.  2 years archived emails are being restored directly into the mailboxes and anything older is exported to .pst files.

The question is how to delete ‘STUBS’ older than 2 years from mailboxes?

Once we have cut-off the links between us and the business they will not have access to the EV servers.

Any advise will be appreciated.

Thanks