Unable to resolve NetBIOS Domain Name

Hi Everyone,

I have an issue with getting the NETBIOS Domain Name for my test domain.  I have 1 DC so far.

Information on my environment:

1 Forest

1 Domain

     FQDN Name:  contoso.local

     NetBIOS Name:  CONTOSO

     Forest Functional Level:  2003

     Domain Functional Level:  2003

     DNS Integrated:  Yes

     DNS Security:  Secure Updates Only

The NETBIOS Name is displayed in Active Directory Users and Computers if I rightclick on my domain and choose Properties.

Nslookup results below.

C:\Users\Administrator>nslookup contoso
Server: localhost
Address: 127.0.0.1

*** localhost can't find contoso: Non-existent domain

C:\Users\Administrator>nslookup
Default Server: localhost
Address: 127.0.0.1> set type=all> _ldap._tcp.dc._msdcs.contoso.local
Server: localhost
Address: 127.0.0.1

_ldap._tcp.dc._msdcs.contoso.local   SRV service location:
     priority    = 0
     weight     = 100
     port      = 389
     svr hostname  = cl-dc-01.contoso.local
cl-dc-01.contoso.local internet address = 10.100.101.111
> contoso.local
Server: localhost
Address: 127.0.0.1

contoso.local  internet address = 10.100.101.111
contoso.local  nameserver = cl-dc-01.contoso.local
contoso.local
    primary name server = cl-dc-01.contoso.local
    responsible mail addr = hostmaster.contoso.local
    serial = 22
    refresh = 900 (15 mins)
    retry  = 600 (10 mins)
    expire = 86400 (1 day)
    default TTL = 3600 (1 hour)
cl-dc-01.contoso.local internet address = 10.100.101.111
>

Of course, joining computers with just contoso wont work but the FQDN does.  Do you know what I can check on this issue?  Thanks.