Service Accent knowledge base

Can not attach a Windows Vista workstation to a legacy NT4 domain

Article ID: 070212102209 - Last Review: 12 February 2007 by jasonl - Revision: 1 - Views: 2498

Symptom

You are trying to connect a Windows Vista workstation to a legacy (ie NT 4/Windows 2000 non-Active Directory) domain and receiving the following error:

The folllowing error occurred attempting to join the domain "domain name":

Logon failure: unknown user name or bad password

Cause

By default, the security settings in Windows Vista do not allow Windows Vista to log on to a non-Active Directory domain

Solution

Follow these steps:

Click Start | Run | secpol.msc
Select Local Policies | Security Options
Change the value of "Network Security: LAN Manager authentication level"
from "NTVLM2 responses only" to "LM and NTLM - use NTLMv2 session security
if negotiated"
Restart the workstation

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