I am so thankful for folks on the web who share their expertise with the rest of us. This tip comes from Steve Hardie.
This article explains how to configure your Windows Server 2008 R2 Active Directory Primary Domain Controller to synchronize time with an external time source.
Net Stop W32Time
W32tm /config /syncfromflags:manual /manualpeerlist:”<ip addresses>”
W32tm /config /reliable:yes
Net Start W32Time
W32tm /config /update
Note: In an active directory, all member computers will sync time with the PDC, so you only need to setup an external time source on the PDC.
Open an elevated command prompt and type the following: