What's the best way to clear mailboxes off a system, if they have not been used for awhile? Scripting it out is my first thought, but maybe there are convenient open-source tools for this...? (It's a ...

I have a couple of people whos mailboxes refuse to migrate from exchange 2003 to exchange 2010. The other 300 users moved with no issues but getting a "unable to modify table" on 2 people and it fails ...