Windows Server 2008 time sync

First, locate your PDC Server. Open the command prompt and type: C:\\>netdom /query fsmo
Log in to your PDC Server and open the command prompt.
Stop the W32Time service: C:\\>net stop w32time
Configure the external time sources, type: C:\\> w32tm /config /syncfromflags:manual /manualpeerlist:time.nist.gov
Make your PDC a reliable time source for the clients. Type: C:\\>w32tm /config /reliable:yes
Start the w32time service: C:\\>net start w32time
The windows time service should begin synchronizing the time. You can check the external NTP servers in the time configuration by typing: C:\\>w32tm /query /configuration