Setting up NTP service properly on your PDC Master

Hi guys,

To set an NTP service properly on your PDC Master do the following:

Setting up

Open your prompt with administrator privilege.

w32tm /config / /syncfromflags:manual /reliable:yes /update
net stop w32time
net start w32time

Confirm if your server is properly configured:

w32tm /monitor
w32tm /query /status

More about


- Set your internal firewall and your perimeter firewall to allow outgoing and incoming NTP traffic from/to your server on 123 UDP port;

Virtual Server?

- Don't forget, if your PDC is a virtual machine hosted on a Hyper-V server, you have to disable the time synchronization in your VM settings. To achieve it, do:

1.Open Hyper-V Manager.
2.Select the Virtual Guest DC
3.Click Settings.
4.Click Integration services.
5.Clear the Time Synchronization option.
6.Exit Hyper-V Manager.
7.Restart the server.

Screwed your configuration up?

Restore it to the default value:

net stop w32time
w32tm /unregister
w32tm /register


If you are facing Event ID errors 47, or if your configuration has the source configuration set as "Local CMOS Clock", try:

Do the above procedures again;
Make sure you can reach your NTP server on the internet, try ping it;
Restart your server and try again.
Make sure you don't have any other NTP settings on your domain through GPO.
Make sure your current time is not as far as 1000 seconds from the real time.
Make sure your server is set at the right zone time.

 I hope to have helped with these tips.

See you.