meeting invitations adressed to accounts that appear similar are going to wrong inbox. example: barney@foo.com bbarney@foo.com meetings addressed to barney are going to bbarney? thanks

Are you sure your users aren't typo'ing? I'd run message tracks against the original invites to see howit routed.

no typos ... I looked at the mesage track and exchange is routing it to the wrong address? Anybody?

THe first thing I'd do is exBPA and dcdiag's on all DC's/GCs