Microsoft KB Archive/284666

= You receive a &quot;you are not authorized to view this page&quot; error message when you try to access an external Web site that requires authentication =

Article ID: 284666

Article Last Modified on 9/12/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2000 Standard Edition
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 4.5 128-Bit Edition
 * Microsoft Internet Explorer 3.2

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This article was previously published under Q284666





SYMPTOMS
When you try to access an external Web site that requires authentication, you are not prompted to enter your account credentials. Therefore, you cannot access the Web site. When you try to access the Web site, you receive the following error message:

You are not authorized to view this page



CAUSE
This problem may occur when all the following conditions are true:
 * A version of Microsoft Internet Explorer that is earlier than version 6 is installed on your computer.
 * Internet Explorer is configured as a Web proxy client of a computer that is running Microsoft Internet Security and Acceleration (ISA) Server 2000.
 * The external Web site is located on a computer that is running Microsoft Internet Information Services (IIS) that is configured to use Integrated Windows authentication.

Note In IIS 4.0, Integrated Windows authentication is known as NTLM or as Windows NT Challenge/Response authentication.



RESOLUTION
To resolve this problem, upgrade Internet Explorer to version 6 or later. Also, Microsoft recommends that you install the latest Internet Explorer updates from the Microsoft Windows Update Web site.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Internet Explorer.



MORE INFORMATION
To obtain the latest version of Internet Explorer and Internet Explorer updates, visit the following Microsoft Windows Update Web site:

http://windowsupdate.microsoft.com

For more information about Web Proxy clients, visit the following Microsoft Web site:

http://www.microsoft.com/technet/isa/2004/help/CMT_WebProxyClient.mspx?mfr=true

Keywords: kbbug kbfix KB284666

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