Consider the following scenario.

• On a Web Distributed Authoring and Versioning (WebDAV) site, you set the Secure Sockets Layer (SSL) setting for client certificates to Accept.
• On a computer that is running Windows Vista or Windows Server 2008, a user adds this WebDAV site by running the Add Network Location Wizard or the Map Network Drive Wizard.
• After the user finishes running the wizard, the Select Certificate dialog box is displayed. In the Select Certificate dialog box, the user clicks Cancel.

In this scenario, you expect the user to obtain an instant connection to the WebDAV site or to receive a dialog box that requests the user’s credentials. Instead, the operation exits unexpectedly.

Notes

• When the SSL setting for client certificates is set to Accept, you expect the user to be able to provide a certificate or credentials to access the WebDAV site.
• This issue does not occur on a computer that is running Windows XP or Windows Server 2003.

Consider the following scenario:

• On a computer that is running Windows Vista or Windows Server 2008, you try to access a file on a Web Distributed Authoring and Versioning (WebDAV) server.
• This WebDAV server is located on an external network.
• You access the WebDAV server by using a proxy server that requires authentication.

Before you can open the file in this scenario, you are prompted for authentication four times. You expect to be prompted for authentication only two times.

Note: You expect to be prompted to authenticate one time against the proxy server and the other time against the WebDAV server.

Consider the following scenario. You use Windows Internet Explorer to visit a Microsoft Office SharePoint Portal Server site. When you select Explorer View on the site, a WebDAV PROPFIND request is sent. However, an extra forward slash mark (/) is appended to the query path in the WebDAV PROPFIND request.

Because of this behavior, the request may be blocked by some firewalls, or it may be routed to the wrong server. In this scenario, you cannot access the correct resource.

This problem may occur in the following Microsoft Windows operating systems:

• Windows XP
• Windows Vista
• Windows Server 2008

Web Distributed Authoring and Versioning: A set of extensions to the Hypertext Transfer Protocol (HTTP) which allows users to collaboratively edit and manage files on remote World Wide Web servers.

On a Windows Vista-based computer, you try to access files on a Web Distributed Authoring and Versioning (WebDAV) site that uses only Digest authentication. However, the process may fail after you are prompted three times for your user credentials and password.

If you use a network trace when this problem occurs, the network trace may indicate that the WebDAV server generates a code 401 (Authorization Required) error.

Description: This critical security update resolves one privately reported vulnerability in the WebDAV Mini-Redirector. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. This security update addresses the vulnerability by modifying the way that the Mini-Redirector handles long pathnames. Keep reading →

After you connect to a Web site that has Web Distributed Authoring and Versioning (WebDAV) enabled from a Windows Vista-based client computer, you may be unable to access certain directories on the WebDAV server. This problem occurs when you do not have the access permission to the parent directories of the destination directories.

Note: This problem does not occur on a Windows XP-based client computer.

When you try to access a Web Distributed Authoring and Versioning (WebDAV) share for the first time on a Windows Vista-based computer, you experience a long delay.

Additionally, you may experience the long delay during a later attempt to access a WebDAV share when the connection to the WebDAV workspace is closed.

Note: If the connection to the workspace remains, you will not experience the long delay when you access the WebDAV share.

Consider the following scenario:

• You are running a Windows Vista-based computer.
• You try to access a Web Distributed Authoring and Versioning (WebDAV) site that is located on a server that uses passport authentication.

In this scenario, you may be prompted for your passport credentials every time that you try to access documents on the WebDAV site from a new workspace.

This behavior occurs even after you save your passport credentials in Credential Manager.

Consider the following scenario:

• You are running a Windows Vista-based computer.
• You use Windows Internet Explorer to access files on a Web Distributed Authoring and Versioning (WebDAV) site that resides on a local intranet site.
  Note: A Microsoft SharePoint Portal Server site is an example of a WebDAV site.

In this scenario, you receive a dialog box that prompts you to enter your user credentials.

This problem occurs if the following conditions are true:

• You do not configure any proxy-server settings in Internet Explorer.
• You access the WebDAV site on the local intranet site by using a single label host name, such as http://sites/ or http://mysps/.

This problem does not occur on a Windows XP-based computer that has Internet Explorer 6 or Internet Explorer 7 installed.