Windows Time Sync

use w32tm to sync you master domain controller with NTP

Test to make sure you can access the server
w32tm /stripchart /
w32tm /stripchart /
w32tm /stripchart /
w32tm /stripchart /

Configure your servers
w32tm /config /update /syncfromflags:manual /reliable:yes /manualpeerlist:",0x8,0x8,0x8,0x8"

Check your servers status
w32tm /query /peers

Another check to see where you are
w32tm /query /status

Then you can check the status
w32tm /monitor

If you want to check your server to make sure it replies:
w32tm /stripchart /