Symptoms

Assume that you have a Web Distributed Authoring and Versioning (WebDAV) folder. The folder is a trusted site in Windows Internet Explorer on a computer that is running Windows Vista or Windows Server 2008. However, if you set the Autologon policy security level to medium, you cannot open the WebDAV folder by using the Microsoft SharePoint Explorer View feature. Additionally, you may receive an "access denied" error.

Note You may also receive other error messages, such as the following:

Your client does not support opening this list with Windows Explorer.

Cause

The issue occurs because WebDAV does not send authentication credentials if the Autologon policy security level is not set correctly.

Resolution

After you install this hotfix, a check is performed to determine whether the site is trusted or not trusted before the computer sends a request to the server. If the site is trusted, the Autologon policy security level is set to low.

Hotfix information

A 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 the problem described in this article. 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:

http://support.microsoft.com/contactus/?ws=supportNote The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, you must be running one of the following operating systems:

  • Windows Vista Service Pack 1 (SP1)

  • Windows Vista Service Pack 2 (SP2)

  • Windows Server 2008

  • Windows Server 2008 Service Pack 2 (SP2)

For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:

935791 How to obtain the latest Windows Vista service pack

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

968849 How to obtain the latest service pack for Windows Server 2008

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

    Version

    Product

    SR_Level

    Service branch

    6.0.600
    1.
    22xxx

    Windows Vista and Windows Server 2008

    SP1

    LDR

    6.0.600
    2.
    22xxx

    Windows Vista and Windows Server 2008

    SP2

    LDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Davclnt.dll

6.0.6001.22944

55,296

14-Jul-2011

14:33

x86

Mrxdav.sys

6.0.6001.22944

113,664

14-Jul-2011

12:50

x86

Webclnt.dll

6.0.6001.22944

199,168

14-Jul-2011

14:37

x86

Webclnt.dll

6.0.6002.22679

200,192

14-Jul-2011

15:17

x86

For all supported x64-based versions of Windows Server 2008 and of Windows Vista

File name

File version

File size

Date

Time

Platform

Davclnt.dll

6.0.6001.22944

73,728

14-Jul-2011

14:55

x64

Mrxdav.sys

6.0.6001.22944

138,240

14-Jul-2011

13:08

x64

Webclnt.dll

6.0.6001.22944

216,576

14-Jul-2011

14:59

x64

Webclnt.dll

6.0.6002.22679

219,136

14-Jul-2011

15:25

x64

Mrxdav.sys

6.0.6001.22944

113,664

14-Jul-2011

12:50

x86

Davclnt.dll

6.0.6001.22944

55,296

14-Jul-2011

14:33

x86

Webclnt.dll

6.0.6001.22944

199,168

14-Jul-2011

14:37

x86

Webclnt.dll

6.0.6002.22679

200,192

14-Jul-2011

15:17

x86

Status

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

More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008

File name

Update.mum

File version

Not applicable

File size

2,383

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

X86_1d932a021a74a49c787323113b31bc0e_31bf3856ad364e35_6.0.6002.22679_none_966dbe5551640300.manifest

File version

Not applicable

File size

709

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

X86_6febbd2fe75555c7391c318614acf6a5_31bf3856ad364e35_6.0.6001.22944_none_e744274c13223a83.manifest

File version

Not applicable

File size

709

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

X86_a7c64eee9eccf3f7d43f03d542cb45e1_31bf3856ad364e35_6.0.6001.22944_none_947969ba9b847818.manifest

File version

Not applicable

File size

1,059

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

X86_b02226a306e2ff9319cdeab24189f35e_31bf3856ad364e35_6.0.6001.22944_none_e21cd937965d7356.manifest

File version

Not applicable

File size

1,412

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.0.6001.22944_none_942fd6b26b7998a6.manifest

File version

Not applicable

File size

5,069

Date (UTC)

14-Jul-2011

Time (UTC)

14:50

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.0.6001.22944_none_150d52aadef602bc.manifest

File version

Not applicable

File size

13,642

Date (UTC)

14-Jul-2011

Time (UTC)

14:47

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.0.6001.22944_none_5588372fccec01a3.manifest

File version

Not applicable

File size

6,904

Date (UTC)

14-Jul-2011

Time (UTC)

14:51

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.0.6002.22679_none_57533ac5ca26294d.manifest

File version

Not applicable

File size

6,904

Date (UTC)

14-Jul-2011

Time (UTC)

15:41

Platform

Not applicable

Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008

File name

Amd64_03e0225f9ea3df5adb41827a1f532968_31bf3856ad364e35_6.0.6002.22679_none_d443e14dbef7a68f.manifest

File version

Not applicable

File size

1,066

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

Amd64_05975e36e832a32346c396b688923626_31bf3856ad364e35_6.0.6001.22944_none_a1650703223ee081.manifest

File version

Not applicable

File size

2,126

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

Amd64_3de16fb08ab145c939378594b6d4199e_31bf3856ad364e35_6.0.6001.22944_none_95a2593111c72fb1.manifest

File version

Not applicable

File size

2,478

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

Amd64_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.0.6001.22944_none_f04e723623d709dc.manifest

File version

Not applicable

File size

5,087

Date (UTC)

14-Jul-2011

Time (UTC)

15:16

Platform

Not applicable

File name

Amd64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.0.6001.22944_none_712bee2e975373f2.manifest

File version

Not applicable

File size

13,906

Date (UTC)

14-Jul-2011

Time (UTC)

15:10

Platform

Not applicable

File name

Amd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.0.6001.22944_none_b1a6d2b3854972d9.manifest

File version

Not applicable

File size

6,934

Date (UTC)

14-Jul-2011

Time (UTC)

15:17

Platform

Not applicable

File name

Amd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.0.6002.22679_none_b371d64982839a83.manifest

File version

Not applicable

File size

6,934

Date (UTC)

14-Jul-2011

Time (UTC)

15:47

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,401

Date (UTC)

14-Jul-2011

Time (UTC)

18:53

Platform

Not applicable

File name

Wow64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.0.6001.22944_none_7b809880cbb435ed.manifest

File version

Not applicable

File size

8,609

Date (UTC)

14-Jul-2011

Time (UTC)

14:42

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.0.6001.22944_none_942fd6b26b7998a6.manifest

File version

Not applicable

File size

5,069

Date (UTC)

14-Jul-2011

Time (UTC)

14:50

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.0.6001.22944_none_5588372fccec01a3.manifest

File version

Not applicable

File size

6,904

Date (UTC)

14-Jul-2011

Time (UTC)

14:51

Platform

Not applicable

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.0.6002.22679_none_57533ac5ca26294d.manifest

File version

Not applicable

File size

6,904

Date (UTC)

14-Jul-2011

Time (UTC)

15:41

Platform

Not applicable

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