There is a case like this. There is an process automatic control system, which requires the system time to sychronize with an external time source (such as GPS), furthermore, this systems's time takes precedence of the windows system clock. It will override windows time changes. But how to implement it ?
There are a Windows client, a server connected to a dedicated system and an external GPS. The server is synchronizing with GPS, and the windows client will take the server's time as its time source.
I have tested the time synchronization between PRM client and PRM server（simulated）,the detailed process as below:
RRM server side:
In register, you need to change a item as picture shows:
Next, open group policy editor of RRM server and make a change:
2. What should be set on PRM client?
Everything as the document described what I have provided .
3.After finishing step 2 and 3, please use the following commands to restart W32time service and resynchronize with remote server. Note: this step will be performed on windows client machine.
It believe it will be success, good luck.