Recipe 2.7 Finding the NetBIOS Name of a Domain

2.7.1 Problem

You want to find the NetBIOS name of a domain. Although Microsoft has moved to using DNS for primary name resolution, the NetBIOS name of a domain is still important, especially with down-level clients that are still based on NetBIOS instead of DNS for naming.

2.7.2 Solution Using a graphical user interface
  1. Open the Active Directory Domains and Trusts snap-in.

  2. Right-click the domain you want to view in the left pane and select Properties.

The NetBIOS name will be shown in the "Domain name (pre-Windows 2000)" field. Using a command-line interface
> dsquery * cn=partitions,cn=configuration,<ForestRootDN> -filter[RETURN] 
"(&(objectcategory=crossref)(dnsroot=<DomainDNSName>)(netbiosname=*))" -attr[RETURN] 
netbiosname Using VBScript
' This code prints the NetBIOS name for the specified domain
strDomain = "<DomainDNSName>"  ' e.g.
' ------ END CONFIGURATION ---------

set objRootDSE = GetObject("LDAP://" & strDomain & "/RootDSE")
strADsPath =  "<LDAP://" & strDomain & "/cn=Partitions," & _
             objRootDSE.Get("configurationNamingContext") & ">;"
strFilter = "(&(objectcategory=Crossref)" & _
            "(dnsRoot=" & strDomain & ")(netBIOSName=*));"
strAttrs = "netbiosname;"
strScope = "Onelevel"
set objConn = CreateObject("ADODB.Connection")
objConn.Provider = "ADsDSOObject"
objConn.Open "Active Directory Provider"
set objRS = objConn.Execute(strADsPath & strFilter & strAttrs & strScope)
WScript.Echo "NetBIOS name for " & strDomain & " is " & objRS.Fields(0).Value

2.7.3 Discussion

Each domain has a crossRef object that is used by Active Directory to generate referrals. Referrals are necessary when a client performs a query and the directory server handling the request does not have the matching object(s) in its domain. The NetBIOS name of a domain is stored in the domain's crossRef object in the Partitions container in the Configuration NC. Each crossRef object has a dnsRoot attribute, which is the fully qualified DNS name of the domain. The netBIOSName attribute contains the NetBIOS name for the domain.

    Chapter 3. Domain Controllers, Global Catalogs, and FSMOs
    Chapter 6. Users
    Appendix A. Tool List