Relinking mailbox to user – Help!

Hi,

I’m running a SBS2003. I have a mailbox in: First Storage Group > Mailbox Store > Mailboxes. That mailbox isn’t linked to an email address anymore.

How can I get into that mailbox to get the mail? Is there a way to export what’s in there as a .pst file? Can I re-link that mailbox with an email address? Or…?

Thanks!