Article ID: 941853 - View products that this article applies to.
When you use Windows Internet Explorer to access files on a Web Distributed Authoring and Versioning (WebDav) site on a Windows Vista-based computer, you receive a dialog box that prompts you to type your user credentials.
Note A SharePoint Portal Server site is an example of a WebDav site.
This problem occurs if you disable the Automatically detect settings option in Internet Explorer and instead use an automatic configuration script to configure proxy settings. For information about how to enable the Automatically detect settings setting, see the "More Information" section.
This problem does not occur in Windows XP.
When you use Internet Explorer to access the WebDAV site, Internet Explorer uses Windows HTTP Services (WinHTTP). WinHTTP sends user credentials only in response to requests that occur on a local intranet site during an authenticated logon process. However, WinHTTP does not check the security zone settings in Internet Explorer to determine whether a Web site is a local intranet site. Instead, WinHTTP depends on the proxy settings in Internet Explorer to determine whether a Web site is a local intranet site. If the Automatically detect settings option is not enabled, any autoconfiguration script that is defined will not be processed. WinHTTP will not identify the WebDAV site as a local intranet site. Therefore, WinHTTP will send out a request without user credentials, and you will be prompted to type user credentials.
Service pack informationTo resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/935791/ )How to obtain the latest Windows Vista service pack
Hotfix informationA supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
PrerequisitesNo prerequisites are required.
Restart requirementYou have to restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace any other hotfixes.
Registry informationTo use this hotfix, you do not have to make any changes to the registry.
File informationThe English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows Vista, 32-bit versions
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Windows Vista, 64-bit versions
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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows Vista Service Pack 1.
To enable the Automatically detect settings setting, follow these steps:
http://msdn2.microsoft.com/en-us/library/aa383144.aspxFor more information, click the following article number to view the article in the Microsoft Knowledge Base:
936611For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/936611/ )Internet Explorer 7 incorrectly recognizes an intranet Web site as an Internet Web site
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates
Article ID: 941853 - Last Review: October 8, 2011 - Revision: 5.0