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.
netdom /query fsmo2) Login to your PDC and open the command prompt as the Administrator 3) Stop the w32Time Service
net stop w32time4) Configure the external time sources, type
w32tm /config /syncfromflags:manual /manualpeerlist:”0.pool.ntp.org, 1.pool.ntp.org, 2.pool.ntp.org”5) Make your PDC a reliable time source for the clients
w32tm /config /reliable:yes6) Start the w32time Service
net start w32time7) Check thes servers time configuration
w32tm /query /configuration8) Check the Event Viewer for any errors
More helpfull w32tm commandsForce synchronizing the time asap
w32tm /resync /nowaitDisplay time source
w32tm /query /sourceDisplay list of all configured NTP servers and their status
w32tm /query /peersDisplay time service status i.e whether it is getting time from local cmso clock/external NTP server
w32tm /query /status
The Windows Time Service logs several events in the Windows System log, which can be viewed in the Event Viewer application.
Event ID: 1
General Info: The system time has changed to xxx from xxx. Change Reason: An application or system component changed the time.
Event ID: 35
General Info: The time service is now synchronizing the system time with the time source xxx
Event ID: 37
General Info: The time provider NtpClient is currently receiving valid time data from xxx
Domain Controllers will also record the following events:
Event ID: 139
General Info: The time service has started advertising as a time source.
Event ID: 143
General Info: The time service has started advertising as a good time source.
Event ID: 144
General Info: The time service has stopped advertising as a good time source.