hello realm (G) This option specifies the kerberos realm to use. The realm is used as the ADS equivalent of the NT4 domain. It is usually set to the DNS name of the kerberos server. Default: realm = Example: realm = mysambabox.mycompany.com In smb.conf [global] . . . realm = yourdomain.com ok!!!!! you shoud have a account in w2k3 ou Ntdomain net join -S domserver -U Administrator i Used net join -S Namedomainserver -W MyWorkGroup OKK!!!!