Need to restore a mailbox for a server and domain that no longer exist
I have a client who needs a users mailbox restored from back in Jan 2010. Normally this wouldn't be a huge issue, however the server and domain that the backup was created on no longer exist. I try to restore from tape but just get an error "Unable to attach to a resource" which would make sense I guess as it would be trying to authenticate against the old domain controller.
Is there a way I can restore the mailbox in the new environment?
We use BE 12.5, the server was an SBS 2003 server with Exchange 2003. We currently run Exchange 2007 in our environment.