On Thu, 21 Jul 2005 11:03:31 -0500, "Jerry" <je***@mwex.com> wrote:

>SBS 2003 as the PDC and several other servers on various versions of Server
>2003.  I performed these steps on the PDC :
>Synching to an External Time Source
>If you want to ensure that the clocks on your machines are more accurate in
>terms of absolute (and not just relative) time, you can sync the PDC
>Emulator in your forest root domain to one of the reliable time servers
>available on the Internet. This is a good idea if your company is a large
>enterprise with sites spanning several countries, or if your organization
>has two or more forests linked by forest trusts. The procedure for doing
>this on a PDC Emulator running Windows Server 2003 in the forest root domain
>is as follows. Open Registry Editor (regedit.exe) and configure the
>following registry entries:
>
>HKLM\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\Type
>
>This registry entry determines which peers W32Time will accept
>synchronization from. Change this REG_SZ value from NT5DS to NTP so the PDC
>Emulator synchronizes from the list of reliable time servers specified in
>the NtpServer registry entry described below.
>
>HKLM\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags
>
>This registry entry controls whether the local computer is marked as a
>reliable time server (which is only possible if the previous registry entry
>is set to NTP as described above). Change this REG_DWORD value from 10 to 5
>here.
>
>HKLM\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\NtpServer
>
>This registry entry specifies a space-delimited list of stratum 1 time
>servers from which the local computer can obtain reliable time stamps. The
>list may consist of one or more DNS names or IP addresses (if DNS names are
>used then you must append ,0x1 to the end of each DNS name). For example, to
>synchronize the PDC Emulator in your forest root domain with
>tock.usno.navy.mil, an open-access SNTP time server run by the United States
>Naval Observatory, change the value of the NtpServer registry entry from
>time.microsoft.com,0x1 to tock.usno.navy.mil,0x1 here. Alternatively, you
>can specify the IP address of this time server, which is 192.5.41.209
>instead.
>
>Now stop and restart the Windows Time service using the following commands:
>
>net stop w32time
>
>net start w32time
>
>It may take an hour or so for the PDC Emulator to fully synchronize with the
>external time server because of the nature of the polling method W32Time
>uses. Depending on the latency of your Internet connection, the accuracy of
>the CMOS clock on your forest root PDC Emulator may be within a second or
>two of UTC. If you need more accurate time however, you can purchase a
>hardware time source like an atomic clock and connect it to your PDC
>emulator.
>
>Alternatively, if you don't want to wait for time convergence to occur
>between your stratum 2 time server (your forest root PDC Emulator) and the
>external stratum 1 time server, you can run the following command on your
>PDC Emulator:
>
>w32tm /resync /rediscover
>
> Now , the PDC and all the XP workstations are on the same time, but the
>other servers are off by one minute.   How do I get all the other servers to
>sync with the PDC ??? Thanks
>