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Set Windows 2008 R2 Server to Sync Time with Time.Windows.com

cloudservuscom Oct 6, 2011 5:19:45 AM

Active Directory

Time synchronization is an important aspect for all computers on the network. By default, the clients computers get their time from a Domain Controller and the Domain Controller gets his time from the domain’s PDC Operation Master. Therefore the PDC must synchronize his time from an external source. I usually use the servers listed at the NTP Pool Project website. Before you begin, don’t forget to open the default UDP 123 port (in- and outbound) on your firewall. 

  1. First, locate your PDC Server. Open the command prompt and type: C:>netdom /query fsmo
  2. Log in to your PDC Server and open the command prompt.
  3. Stop the W32Time service: C:>net stop w32time
  4. Configure the external time sources, type: C:> w32tm /config /syncfromflags:manual /manualpeerlist:time.windows.com
  5. Make your PDC a reliable time source for the clients. Type:C:>w32tm /config /reliable:yes
  6. Start the w32time service: C:>net start w32time
  7. 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
  8. Check the Event Viewer for any errors.

Tested on Windows Server 2008 R2 (Build 7600).

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