Microsoft KB Archive/170852

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Access is Denied ErrMsg to Subdirectory Using Windows NT Challenge/Response

Article ID: 170852

Article Last Modified on 6/23/2005


  • Microsoft Internet Information Server 3.0

This article was previously published under Q170852

We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:


Microsoft Windows NT Challenge/Response (NTLM) will fail to permit you access to a subdirectory if you do not have sufficient permissions to the root of the drive. However, if basic authentication is used, you can open the web page.


To work around this, use one of the following methods:

  • Grant sufficient permissions for the user in the root of the drive.
  • Upgrade to IIS 4.0, which fixes this problem.


Microsoft has confirmed this to be a problem with Microsoft Internet Information Server version 3.0.

Additional query words: iis

Keywords: kbbug kbfix KB170852