The good news is nltest will work from the command line. The bad news is that it won't work from within perl. I've tried using

@args = ("nltest", "\/server:BW2012R2", "\/dsgetdc:Testlab");
system(@args) == 0 or die "system @args failed: $?";
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Output:

'nltest' is not recognized as an internal or external command, operabl
+e program or batch file.
system nltest /server:BW2012R2 /dsgetdc:Testlab failed: 256
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I've also tried to use IPC::Run and IPC::Cmd with similar results. How can I run the nltest cmd directly from the commandline, but not from within a perl script?