Tech Support > Microsoft Windows > Windows Server > Setting my PDC Emulator to time sync to external time source
Setting my PDC Emulator to time sync to external time source
Posted by aja44 on April 3rd, 2008


Hi all,

I have a couple of servers and a few hundered computers in my school. I
have a time sync as part of the users logon scripts that sync the time on
their PC to the PDC Emulator FSMO box. All DC's are running Server 2003 with
a couple of 2000 servers running applications. All the servers and PC's show
the same time as my PDC Emulator. But when I go to
http://www.time.gov/timezone.cgi?Eastern/d/-5/java for time I find that I am
3 minutes off. I would like to sync my PDC Emulator DC to an outside time
source. Can some help me out doing this. I found a kb article that has a
series of registry settings but reference peers which I did not understand.

Thanks,

Posted by Bjarne Duelund on May 17th, 2008


Use this command on your PDC:
w32tm /config /manualpeerlist:<timesource> /syncfromflags:manual
/reliable:yes /update

where <timesource> is the IP address or DNS name of your external
timesource.

and restart the time service with (might not be needed, but just in
case...):
net stop w32time
net start w32time

All other Domain Controllers should sync automatically with the PDC and all
other clients (member servers and workstations (Windows 2000+)) in the
domain, should automatically sync with any Domain Controller - no need for
syncing in the logon script.

To assure normal domain time syncing on other than the PDC, use this
command:
w32tm /config /syncfromflags:domhier /update

and restart the time service with:
net stop w32time
net start w32time


Hope this helps,
- Bjarne Duelund


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