Configuring AD Domain Controller to sync off a NTP source

1) Check which is the PDC emulator (Users & Computers → Operations Masters) 2) on The PDC configure with NTP peer list to sych (space seperated)

w32tm /config /manualpeerlist:",0x1,0x1
w32tm /config /reliable:yes

This details are stored here:


Change type from “NT5DS” to “NTP” (using registry).

Restart w32time service

Useful Commands

w32tm /resync
w32tm /query /status

And use wireshark and event viewer to confirm all OK.

for more info see:

Set the ‘Announce Flags’ registry entry to 5, to indicate a reliable time source.

The ‘Special Poll Interval’ registry entry defines the period in seconds that the Windows 2003 machine should poll the NTP server. A recommended value is 900 seconds, which equates to every 15 minutes.

The ‘NTP Server’ parameter is used to provide a list of IP addresses or DNS names, separated by a space, of NTP servers that the Windows 2003 machine can synchronise to. 

Changing the ‘Enabled’ flag to the value 1 enables the NTP Server.

Change the server type to NTP by specifying ‘NTP’ in the ‘Type’ registry entry.
  • vendors/microsoft/os/ntp.txt
  • Last modified: 2018/05/17 19:56
  • by gerardorourke