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.

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. For information about how to enable this option, see the “More Information” section.

Note: This problem does not occur in Windows XP.

Consider the following scenario:

• On a Windows Vista-based computer, you map a drive to a Web Distributed Authoring and Versioning (WebDav) shared file that is located on an Internet Information Services (IIS) 6.0 server. To map the drive, you use the following command:
  

  NET USE X: HTTPS://SERVERNAME/SHARENAME

  Note: The X placeholder represents the letter of the drive that you want to map to the shared resource. The SERVERNAME placeholder represents the server on which the shared file is located. The SHARENAME placeholder represents the shared file to which you want to map the drive.

• You select a certificate when you are prompted, and you click OK to confirm.

In this scenario, you receive an error message that resembles the following:

System error 1397 has occurred. Mutual Authentication failed. The server’s password is out of date at the domain controller.

This problem may also occur when you use the HTTPS protocol to try to access a WebDav shared file on a Java-based WebDav Server.

Notes:

• This problem occurs if mutual authentication is enabled on the server that is running IIS 6.0 server.
• If you use the HTTP protocol instead of the HTTPS protocol to access the WebDav shared file, this problem does not occur.
• After the dialog box appears, if you do not click OK to confirm the selection of the certificate within 10 seconds, this problem does not occur.

In Windows Vista, the Svchost.exe process stops responding when you try to copy encrypted Encrypting File System (EFS) files to a Web Distributed Authoring and Versioning (WebDAV) resource. If you use Windows Explorer to do this, Windows Explorer stops responding. You may have to restart the computer.

Note: The Svchost.exe process hosts the WebClient service.

When you try to save an encrypted 2007 Microsoft Office document to a WebDAV resource, you may receive an error message that says that the document cannot be saved.

When you use a screen reader program, such as Narrator, to read screen items in a WebDAV location in Windows Vista common file dialog boxes, you experience the following symptoms:

• The screen reader program may read the contents of a dialog box one time, and then the screen reader program no longer works. If you press TAB or SHIFT+TAB to move the focus through elements in the dialog box, the screen reader still does not work.
• If you close and then reopen the dialog box, the screen reader again reads the dialog box items one time.
  You experience this problem if you open a common file dialog box to a WebDAV location.

Note: WebDAV is the set of extensions to the HTTP protocol. WebDAV lets users collaboratively edit and manage files on remote Web servers. Microsoft Office SharePoint Portal Server is an example of a WebDAV location.