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Error message on a Windows Vista-based computer when you try to access a network drive that is mapped to a Web share: "The operation being requested was not performed because the user has not been authenticated"
Article ID: 941050 - View products that this article applies to.
Consider the following scenario on a Windows Vista-based computer:
Note The mapped drive appears as disconnected after you log on to the computer again.
An error occurred while connecting to address
The operation being requested was not performed because the user has not been authenticated
The connection has not been restored
In Windows Vista, the Web Distributed Authoring and Versioning (WebDAV) redirector uses Windows HTTP Services (WinHTTP) instead of the Windows Internet (WinInet) API. In a non-proxy network configuration, WinHTTP sends user credentials only in response to requests that occur on a local intranet site. Therefore, if no proxy is configured, you may be unable to access a share that requires user credentials.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756To resolve this problem, apply hotfix 943280.
(http://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
943280After you apply this hotfix, you have to create a registry entry. To do this, follow these steps:
(http://support.microsoft.com/kb/943280/ )You are prompted to enter your credentials when you access an FQDN site by using a Windows Vista-based client computer that has no proxy configured
Note You have to restart the WebClient service after you modify the registry.
Sample URL listThe following is a sample URL list:
This URL list enables the WebClient service to send credentials through the following channels.
https://*.Contoso.com http://*.dns.live.com *.microsoft.com https://188.8.131.52
Note After you configure this URL list, the credentials will automatically authenticate to the WebDAV servers even if these servers are on the Internet.
Things to avoid in the URL list
If Basic authentication or Digest authentication is implemented in the network, hotfix 943280 cannot change this behavior. This behavior is by design in Basic authentication mode and in Digest authentication mode.
IIS does not support Windows authentication over the Internet. Therefore, this hotfix applies only to the Intranet scenarios.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 941050 - Last Review: October 26, 2011 - Revision: 2.0