The short version of the guide is: connect your microsoft tools to nsdc-servername once you installed the AD account provider, and it will act as any regular AD environment.
When you install the AD account provider, you are asked for an IP in the same segment as your Nethserver green-interface. That is the IP you can connect to with mmc snap-ins.
You will have to ‘mix’ as Nethserver does not provide tools to administer the active directory, at all. Barring user creation, you need microsoft or compatible tools. The good thing is, they work like normal.