How To Configure Windows Server 2008 Domain Controller PDCe Role To Accept Time Source

We have recently converted our domain controllers from 2003 to 2008. Our organization has multiple forests, and each forest typically has one domain.

In server 2003, we pointed the PDCe role server to another department's NTP role server (which is outside of our domain and forest, but inside our organization's network in another forest) and pulled time from it to establish the time for our domain. A simple CLI command completed this process.

After reviewing Technet, I cannot find similar straightforword command in server 2008 to complete this task - every article recommends modifying the registry on the domain controller with the PDCe role.

Has anybody else configured their PDCe role server to establish your NTP server in this way using a simple CLI command?

Thanks!

mainbearing