To create sub-subdomains and manage them on this DNS server, right-click on your forward lookup zone and click on "New domain".
Then, enter the name of the subdomain to create.
In our case, we indicate "corp" to create the "corp.informatiweb.lan" subdomain.
Thus, we can then create domains like this : xxxx.corp.informatiweb.lan
A "corp" folder appeared.
If you create a A record named "directaccess" in this "corp" folder, you will get this domain : directaccess.corp.informatiweb.lan
To manage a subdomain and its sub-subdomains on another DNS server, you will need to create a delegation.
To do this, first create a A record that points to the IP address of that other DNS server.
Then, right click on your forward lookup zone and click on "New Delegation".
The new delegation wizard is displayed.
Specify the subdomain to delegate.
Add the name server (the DNS server) that will manage the corresponding DNS zone for this subdomain.
In our case, it's the "web-ns.informatiweb.lan" server.
Click "Resolve" to add it to the list.
The wizard will validate the status of this third-party server.
If all goes well, the server can be added to the list of name servers.
The delegation has been created.
As you can see, a subdomain managed by a third-party server (through delegation) has a different icon than a sub-domain managed locally on your DNS server.
In addition, Windows Server will tell you that the DNS server (the name server : NS) that manages this subdomain is called web-ns.informatiweb.lan.
Windows Server 1/15/2013
Windows Server 4/25/2018
Windows Server 5/11/2018
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