synchronize an internal time server with an external time source

To synchronize an internal time server with an external time source

• Open Command Prompt.
• Type the following, where PeerList is a comma-separated list of Domain Name System (DNS) names or IP addresses of the desired time sources:
  w32tm /config /syncfromflags:manual /manualpeerlist:PeerList
• Type:
  w32tm /config /update
  

The most common use of this procedure is to synchronize the internal network's authoritative time source with a very precise external time source. However, this procedure can be run on any computer running Windows XP.

If the computer cannot reach the servers, the procedure fails and an entry is written to the Event Log.

 

Note:

Internet time synchronization updates your clock on a regular basis, but only when you are connected to the Internet. It takes just a moment and should not interfere with your work.

You can type the name of a time server if you want to use one that is not listed. Only time servers that use the Simple Network Time Protocol (SNTP) will work. Inserting an Internet address that uses the Hypertext Transfer Protocol (HTTP) will not work. For more information, refer to RFC 1305. You can obtain RFCs from the RFC Editor Web site.