Microsoft NTP Time Server

Posted on 2006-05-14
Last Modified: 2008-02-01
Can anyone tell me if Microsoft have a NTP Time Server and what the address is ?
Question by:MarionTaylor
    LVL 23

    Expert Comment


    Yes, you can assign a server in your domain as the Time server, here's a good article to set it up.
    Basically, you one server will be the time server in your domain (normally this is your PDC emeulator, let's say the first DC in your domain) and then you will need to configure your clients to look at this time server by either going to all machien an d use command line tool or just adding this option in the DHCP if your domain.. The link shoudl clear things out.. If you need more answers, feel free to ask..
    LVL 82

    Accepted Solution

    There are some publicly available time servers, including Microsoft's; here is a list of some more:
    A list of the Simple Network Time Protocol (SNTP) time servers that are available on the Internet

    There is abolutely NO need to configure anything on any domain member! An AD domain already has a time hierarchy, as a common time is necessary for the Kerberos tickets: any DC will synchronize its time with the DC holding the PDC emulator FSMO role, and any domain member will synchronize with the authenticating DC. So the only machine you have to configure to use an external time source or a hardware clock or whatever for the precise time is the PDC emulator.
    That can be done easily; just open a command prompt on the PDC emulator and enter
    net time /,0x1
    net stop w32time
    net start w32time
    and you should be done (assuming UDP port 123 is open for outbound connections). You can replace with the time server(s) of your choice; add the ",0x1" if you use a FQDN, leave it out if you enter an IP address.

    Basic Operation of the Windows Time Service

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