In the last couple of weeks, we have  installed a couple  server(s) for various clients.   Both servers were installed with Microsoft SBS 2008 and for some reason, apparently random,  the servers seemed  to loose connection, to the Internet.  It would appear that certain websites worked and others did not. It appeared as if the server was just rebooting itself and not starting up correctly.

Anyway after some research and talking to some of my SBSC colleagues, I found a solution to the problem. !!!
It would appear that when you set up SBS 2008 one of the defaults it takes is root hints, and seems to set the wrong DNS setting (well at least for UK TLD’s)

So it seems that the solution to this is to set up DNS forward look-ups instead of using root hints.  There is a very simple way to do this, using OpenDNS..   See the post below.

http://www.channelprosmb.com/blog/entry/2894/How-to-flip-your-SBS-2008-to-forwarders/

So far this seems to have worked well for me.