When I try to move a certain mailbox from exhange 2003 to exchange 2010, it tells me I have "insufficient user access rights"
I am migrating from exchange 2003 to exchange 2010. I moved all mailboxes but one which give me a "insufficient user access rights" error. I am logged in as administrator, but it seems like it doesn't have access to the mailbox I am trying to move. Any ideas?