As part of the process of performing our DC health checks I ran the following command on one of our Domain Controllers:
dcdiag /test:dns /e /f:dns.txt /v
Here’s a screenshot of the command:
It’s is not my intention to describe the various parameters of the dcdiag command in this post, however if you would like further information then I would recommend reading the same technet article that I used as a reference.
On looking through the resulting log file, I noticed the following Warnings:
This was an error that I recognised immediately. I ran the following command:
This command refreshes the registration of all domain controller-specific DNS records. (Useful if they ever get accidentally deleted too)
I ran DCDIAG again and this time the warnings were not present.
You can read more about nltest on Technet.