We have about 60 users here, all on Macs. Authenticates through AD on a Windows Server 2008. All computers are bound to the server. But there are 4 employees that can't log onto any other computer but their own. They get the error that they can't log on at this time due to an error. Never had this issue until recently. OS on some are 10.7 but i've upgraded some computers to Mavericks and they're still getting it. Anyone else see this?