I have a single Windows 2003 domain controller in our environment that acts as a NTP Time Server. I have tried to configure it with various time servers from the internet (Naval Observatory) that I had read from certain websties, but I continually get the event ID 29, which states that the time source is not currently accessible. I was getting this when I had time.windows.com as the time source, but I am also getting it from the other sources also. I even changed the method in which the server polls the time servers in case they are not running the Windows operating system. Which time source should I use so I don't get that message?