Hello FB,
On the Dc with the PDCEmulator role run:
w32tm /config /manualpeerlist

eers /syncfromflags:manual /reliable:yes /update
With "peers" you can set the time source, either DNS name (time.windows.com)
or an ip address from a reliable time source.
Here you can find some of them:
http://www.pool.ntp.org/
Make sure port 123 UDP is opened on the firewall.
Best regards
Meinolf Weber
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> Can I use the "How to configure an authoritative time server in
> Windows Server 2003" article to do the same thing in Windows Server
> 2008?
>
> (http://support.microsoft.com/kb/816042)
>