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

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.

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 "/*" for the domain that you want to access. The trailing "/*" 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.

To resolve this problem, update the Wpad.dat file to include an entry that is followed by a trailing "/*" 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.Note In the code example, contoso is a placeholder for the domain name that is appropriate for your situation.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.