Hello there,
Netbios name can't be changed with any version of windows AD and it default assigned when AD is created.
When you create a new domain during the Active Directory installation procedure, the system provides a default NetBIOS domain name that matches the leftmost label in the DNS domain name up to the first 15 bytes (NetBIOS names have a limit of 15 bytes). You can change this name during the procedure, but you cannot change it thereafter. When you name a stand-alone server or workstation computer, you provide a computer name that is used as the NetBIOS name and is concatenated with the domain name to form the full computer name.
NetBIOS Domain Names
https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-2000-server/cc961556(v=technet.10)?redirectedfrom=MSDN
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