NTP 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 it’s time from the domain’s PDC Operation Master. Therefore the PDC must synchronize it’s 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 (from Lan to Wan) on your firewall.
1) First, locate your PDC Server. Open the command prompt and type:
netdom /query fsmoCopy
2) Login to your PDC and open the command prompt as the Administrator 3) Stop the w32Time Service
net stop w32timeCopy
4) Configure the external time sources, type
w32tm /config /syncfromflags:manual /manualpeerlist:”0.pool.ntp.org, 1.pool.ntp.org, 2.pool.ntp.org”Copy
5) Make your PDC a reliable time source for the clients
w32tm /config /reliable:yesCopy
6) Start the w32time Service
net start w32timeCopy
7) Check thes servers time configuration
w32tm /query /configurationCopy
8) Check the Event Viewer for any errors
More helpfull w32tm commands
Force synchronizing the time asap
w32tm /resync /nowaitCopy
Display time source
w32tm /query /sourceCopy
Display list of all configured NTP servers and their status
w32tm /query /peersCopy
Display time service status i.e whether it is getting time from local cmso clock/external NTP server
w32tm /query /statusCopy
The Windows Time Service logs several events in the Windows System log, which can be viewed in the Event Viewer application.
