No "Windows NT Challenge/Response" Authentication Method Available in IIS 5.0 and Later (252941)

The information in this article applies to:

Microsoft Internet Information Services 5.0
Microsoft Internet Information Services version 6.0

This article was previously published under Q252941

SYMPTOMS

In Internet Information Server (IIS) 4.0, Windows NT Challenge/Response (also known as NTLM) was listed as an authentication method on the Directory Security tab of a Web site. In IIS 5.0 and later, however, this authentication method is not listed.

CAUSE

In IIS 5.0 and later, NTLM is referred to instead as Integrated Windows authentication.

RESOLUTION

Use Integrated Windows authentication as you would have used NTLM in IIS 4.0.

MORE INFORMATION

For more information, refer to the following:

In the IIS 5 Documentation, refer to the following topic:

  Administration
    Server Administration
      Security
        Authentication
          About Authentication

IIS 4.0 and 5.0 Authentication Methods Chart

Modification Type:	Major	Last Reviewed:	6/28/2004
Keywords:	kbpending kbprb KB252941