hello, I have an end user with a mac air, running os x lion. I attached him to a network share on the windows network active directory on server 2008. he is the only one that when he clicks on the network share it locks him out. I check a/d and he is locked out each time. Is there a fix for this. other computer specs are processor 1.7 ghz intel core i5 4gigs memory. this should be an easy fix for such a robust machine.