Windows Server 2003 domain Win32 time issue

Hello all,

We have a group of servers here that are all running Windows Server 2003 and are all established as domain controllers. I have updated the registry on the primary domain controller, call it Purple, to use an external time server in our area. The time has updated on Purple but the other domain controllers are not pulling that time. On my workstation here if I do "net time" command I receive a statement that it is pulling the time from server White. What do I need to do to get all times on workstations and on servers to pull from the server Purple (configured to pull from a time server). Thanks in advance.