On 19/10/2025 08:04, Nicolas Kuri via FreeIPA-users wrote:
It has been recommended everywhere to create the IPA domain as a subdomain of 
the main domain. So in my example I would have:

ipa.example1.local
ipa.example2.local

During the installation of FreeIPA I have to set the Netbios name. The problem 
I see is that if I name a subdomain, e.g., ipa.example1.local and 
ipa.example2.local, the Netbios name will be “IPA” for both. That's not 
advantageous, is it?

When you create a domain, the first component of the DNS domain name is used as the NetBIOS domain name by default, but you're free to choose your own name to use, as long as it's unique and complies with the rules[0].

It looks like hyphens are allowed so IPA-EXAMPLE1 and IPA-EXAMPLE2 are worth considering.

[0] https://learn.microsoft.com/en-us/troubleshoot/windows-server/active-directory/naming-conventions-for-computer-domain-site-ou#netbios-domain-names

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