Recently I've been tasked by a client to look into alternatives to Microsoft supplied products. Why I hear you ask? Simple - while 2003 Small Business Server was a real winner for this client, 2008 SBS has been an unmitigated disaster. A previous IT provider installed it and then left it unmanaged for quite a while. Even though I have subsequently re-installed the system in accordance with Microsoft best practice, we're still having periodic problems. For exmaple, about every 12 days, Active Directory, DNS, Exchange and IIS stop talking to one another. I'm yet to find the precise cause of this and I've just updated this system with all recent updates etc as required. The client's 2003 SBS server was exceptionally stable. No problems, no failures nothing. It ran beautifully for several years and experienced almost no issues at all. So on to the new task - they've learnt about GNU/Linux from a friend. This friend gave bugger all details but enough to hook them in.