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Synchronise time with external NTP server on Windows Server

Time 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 his time from the domain’s PDC Operation Master. Therefore the PDC must synchronize his 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 (in- and outbound) on your firewall.

    1. First, locate your PDC Server. Open the command prompt and type:
    2. Log in to your PDC Server and open the command prompt.
    3. run the following command:
    4. Configure the external time sources, type:
    5. run the following command
    6. Re sync the time services, type:
    7. To check that the command has worked run the following:

NOTE: when doing this on SBS you may get an access denied error if you do remove: /reliable:yes from the line on number 3.


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