Microsoft KB Archive/938307

= You are incorrectly prompted to provide your user name and password when you visit a Web site in the Intranet zone after you upgrade to Internet Security and Acceleration Server 2004 Service Pack 2 =

Article ID: 938307

Article Last Modified on 12/4/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2004 Enterprise Edition

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SYMPTOMS
You upgrade to Microsoft Internet Security and Acceleration Server (ISA Server) 2004 Service Pack 2 (SP2), and then you try to access a Web site in the Intranet zone. However, you are incorrectly prompted for your user name and your password.



CAUSE
This problem occurs because the automatic configuration file (Wpad.dat) that ISA Server 2004 SP2 generates for the proxy client has been changed. The automatic configuration file for the proxy client uses the shExpMatch function together with a trailing &quot;/*&quot; for the domain that you want to access. The trailing &quot;/*&quot; causes the shExpMatch function to return False for the host entry. When Internet Explorer parses the file, the Web site is incorrectly detected in the Internet zone, and you must provide your logon credentials in order to access the Web site.



RESOLUTION
To resolve this problem, update the Wpad.dat file to include an entry that is followed by a trailing &quot;/*&quot; for both the domain that you want to access and for the local domain. For example, add the following lines of code to the Wpad.dat file.

*.contoso.com/*
 * //*.contoso.com

Note In the code example,  is a placeholder for the domain name that is appropriate for your situation.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbtshoot kbbug kbprb kbexpertiseinter KB938307

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