Running 7 servers, 2x LDAP, 2x Mailbox, 2x MTA, 1x Proxy.

When migrating to new storage last month, one of my mailboxes seemed to have lost all of its messages. No idea how it happened, but it did. Now when migrating storage again, I noticed a stranded folder... from that date... that's 20 gigs more than the one in use now. The problem is that this folder will contain files (everything other than the mail messages) of an in-use server, so I can't very well use the traditional migration tools (at least from what I can tell). How can I determine what is actually on this other server and merge it into the existing one if necessary?