Hi, Tried on different versions (eng), when you attempt to enter domain NT4, message alert domain or that he does not exist. Join the domain does not occur. The right to accession is and Win2000/XP clients are connected to the domain without problems.

According to http://support.microsoft.com/kb/940268, Microsoft doesn't support joining a Vista machine to an NT4 domain, so I suspect that we can't join a Windows 7 machine either. I would suggest trying the workaround steps in the KB.You may also want to look at http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/8b4dd460-dd57-41da-b541-6933cd4d2531and http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/5eae37ad-585d-44f1-976b-2c39414e7d22