Domain Controller Authentication

ISSUE: You want to authenticate a machine or Server to a different Domain Controller on a different SiteName. Meaning you don't want a particular machine/Server to authenticate to its default Domain Controller that has been Set up on Sites and Services. One possible purpose of this is version of DC and the patching of DC.

SOLUTION:

You need to run this command first to see what is its DC and DC Site.

nltest /dsgetdc:<DomainName>

and since you don't want the DC to authenticate to that DC Server, what you need to do is to run this command:

nltest /SC_RESET:<DomainName\DCComputerName>

But take note that this is Temporary once you logoff or login it will comeback to its Original DC.

So to permanently authenticate to a desired Sitename you need to follow the below 

HKEY_LOCAL_MACHINE

SYSTEM

CurrentControlSet

Services

Netlogon

Parameters

Create a String value called “SiteName“, and set the sitename of the DC where it is located.

Then login and logoff.

Then re run this - nltest /dsgetdc:<DomainName>

Reference: Windows: How to Switch Domain Controller (Client) - Technipages