How to configure the Windows Time Service on the PDC emulator

In Windows Server PDC Emulator, do the following tasks:
  1. Open a Command Prompt. Click Start, Run, type CMD [Enter]
  2. Type the following command to display the time difference between the local computer and a target computer, and the press [Enter]: w32tm /stripchart /computer: target /samples: n /dataonly , where target for example is, and n is to specifies the number of time samples that will be return from the target computer to test basic NTP communication.
  3. Open User Datagram Protocol (UDP) port 123 for outgoing traffic. If you don't know how to open this port, contact your System Administrator or Firewall Administrator. Sometimes these roles hold by a single employee, common in a small business company.
  4. You also need to open UDP port 123 for incoming NTP traffic.
  5. Type the following command to configure the PDC emulator: w32tm /config /manualpeerlist: peers /syscfromflags:manual /reliable:yes /update [Enter] where peers specifies the list of DNS names or IP addresses of NTP time source that the PDC emulator synchronize from. You may use,,,, for more see this link:
  6. For example, run the following command to configure your PDC emulator to use the following time servers.
w32tm /config /manualpeerlist:"" /reliable:yes /update [Enter]

For Microsoft references, read the following articles:

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