JSI Tip 6987. How can a batch file determine if a domain controller is available?

I have scripted GetDC.bat to return a call directed environment variable with the name of a domain controller in the specified domain, or NO, if a domain controller cannot be located.

The syntax for using GetDC.bat is:

call getdc DomainName DomainController

where DomainName is the name of the domain you are interrogating
and DomainController is the call directed environment variable that will contain \DomainControllerComputerName, if you used a NetBIOS domain name,
or\DomainControllerComputerName.DNSDomainName (like \JSI001.JSIINC.COM) if you used a DNS domain name.

GetDC.bat contains:

@echo offif {%2}

{} @echo Syntax: Call GetDC DomainName DomainController&goto :EOFset %2=NOfor /f "Tokens=1*" %%a in ('nltest /dsgetdc:%1') do if /i "%%a"

"DC:" set %2=%%b