v: switch prints more detailed information about each test s: dcname switch is used to run Dcdiag against a remote server Here is an overview of the switches I’ll be using in the examples below. There are several different command line switches that can be used with Dcdiag, to view them all just use this command dcdiag /? If you want to install it on a system that doesn’t have either of those then you can download the tool from here and install it a Windows XP or later system (hopefully your still not running XP). If you have the Remote Server Administration Tools (RSAT) tools installed then you already have Dcdiag installed. If you have the AD DS role installed then Dcdiag is already installed. There is a really good chance that you already have the Dcdiag tool installed. If you are interested in learning exactly what the Dcdiag command does then I recommend you read that post. I came across a good blog post by Ned Pyle called What does DCDiag actually do that explains each test in more details. I’ll have to admit the descriptions from the help command are not that helpful. You can view a list of tests in the command help menu, run dcdiag /? to see the help menu. So what does Dcdiag actually do? What kinds of tests does it perform? I counted a total of 30 different tests, and some tests had multiple tests. Well, it actually does a pretty good job! I was surprised to find out how many different tests this command actually did. You might be thinking, how well does a command line utility really do at testing and finding issues with domain controllers? You can choose to analyze a single domain controller or all DC’s in a forest. I’ll also show you how to use Dcdiag to test DNS.īe sure to check the examples section below and I’ll show you the output of a normal domain controller and one that has issues.ĭcdiag is a Microsoft Windows command line utility that can analyze the state of domain controllers in a forest or enterprise. In this tutorial, I’ll show you how to use the Dcdiag command line utility to perform a domain controller health Check.
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