Symptoms

Assume that you try to access a Web Distributed Authoring and Versioning (WebDAV) server on a client computer that is running Windows 7 or Windows Server 2008 R2. The WebDAV server requires certificate authentication. However, you encounter one of the following issues:

  • If the certificate is stored on a smart card and if the authentication process requires a personal identification number (PIN), the PIN dialog box does not appear and the connection fails.

  • If the certificate is stored on a file server, a dialog box displays all the certificates in the store instead of only those certificates that are suitable for client authentication.

    Note You can access the WebDAV server if you select the correct certificate in the dialog box.

Note This issue occurs only if the application that you use to access the WebDAV server uses the WebClient service. For example, you use Windows Explorer or SharePoint designer to access the WebDAV server.

Resolution

To resolve this issue, install the following hotfix on the computer.

Note The hotfix does not support scenarios in which the cryptographic service provider (CSP) does not allow the PIN to be transferred programmatically.

Third party CSP's are also required to respond to the function call CryptGetProvParam() (s. http://msdn.microsoft.com/en-us/library/ms938119.aspx ) for PP_IMPTYPE with CRYPT_IMPL_REMOVABLE.

By default, the Certificate Trust List Filtering feature is installed and enabled after you install the hotfix. The Certificate Trust List Filtering feature filters the certificate choice UI presented to users by querying the certificate trust list from the server then filtering the client authentication certificate choice UI to only show certificates that whose issuers are in the trust list presented by the server. You can disable this behavior by setting the DWORD value of the following registry key to 0:

HKLM\\CurrentControlSet\\Services\\WebClient\\Parameters\\EnableCTLFilteringBy default the Automatic Cert Selection feature is installed and enabled after you install the hotfix. The Automatic Cert selection feature automatically selects the appropriate client authentication certificate from the certificate store if there is only a single client authentication certificate in the store. You can disable this behavior by setting the DWORD value of the following registry entry to 0:

HKLM\\CurrentControlSet\\Services\\WebClient\\Parameters\\EnableAutoCertSelection

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that 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 website:

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 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (SP1)

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply 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 7 and Windows Server 2008 R2 file information notes


Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" 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

    6.1.760
    0.
    21xxx

    Windows 7 and Windows Server 2008 R2

    RTM

    LDR

    6.1.760
    1.
    21xxx

    Windows 7 and Windows Server 2008 R2

    SP1

    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 R2 and for Windows 7" section. MUM 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 7

File name

File version

File size

Date

Time

Davclnt.dll

6.1.7600.21146

87,552

07-Feb-2012

05:32

Davclnt.dll

6.1.7601.21917

88,064

07-Feb-2012

06:08

Mrxdav.sys

6.1.7600.21146

117,248

07-Feb-2012

03:22

Mrxdav.sys

6.1.7601.21917

116,736

07-Feb-2012

03:45

Webclnt.dll

6.1.7600.21146

207,872

07-Feb-2012

05:37

Webclnt.dll

6.1.7601.21917

207,872

07-Feb-2012

06:11

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Davclnt.dll

6.1.7600.21146

111,104

07-Feb-2012

06:23

x64

Davclnt.dll

6.1.7601.21917

110,592

07-Feb-2012

06:19

x64

Mrxdav.sys

6.1.7600.21146

141,824

07-Feb-2012

03:45

x64

Mrxdav.sys

6.1.7601.21917

141,312

07-Feb-2012

03:34

x64

Webclnt.dll

6.1.7600.21146

263,168

07-Feb-2012

06:29

x64

Webclnt.dll

6.1.7601.21917

263,680

07-Feb-2012

06:25

x64

Mrxdav.sys

6.1.7600.21146

117,248

07-Feb-2012

03:22

x86

Mrxdav.sys

6.1.7601.21917

116,736

07-Feb-2012

03:45

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 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

X86_003a9a7ad6a270da8df47b7d238ed3ef_31bf3856ad364e35_6.1.7601.21917_none_b4f0a55e3b5c0451.manifest

File version

Not applicable

File size

709

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

X86_0c81c3b30a9290898f354b782aed3e30_31bf3856ad364e35_6.1.7600.21146_none_6f104eb3650b0918.manifest

File version

Not applicable

File size

718

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

X86_0ea763b876c8618d3e24c03f30a5ed9a_31bf3856ad364e35_6.1.7600.21146_none_895215e939edfeb2.manifest

File version

Not applicable

File size

1,059

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

X86_40cd31a5c135d6dc11c1f24500625e62_31bf3856ad364e35_6.1.7601.21917_none_46fbdb231fac223f.manifest

File version

Not applicable

File size

1,059

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

X86_a63d8c1d2a7925f37694dd4b923c2a50_31bf3856ad364e35_6.1.7600.21146_none_4d5061d7369721f9.manifest

File version

Not applicable

File size

709

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

X86_e687a397e3fd3e5501fbf39da90a6c75_31bf3856ad364e35_6.1.7601.21917_none_bd729feea8ea5d55.manifest

File version

Not applicable

File size

718

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

X86_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.1.7600.21146_none_94597fadcc8f3b7e.manifest

File version

Not applicable

File size

4,113

Date (UTC)

07-Feb-2012

Time (UTC)

06:06

File name

X86_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.1.7601.21917_none_96617685c99c36d3.manifest

File version

Not applicable

File size

4,113

Date (UTC)

07-Feb-2012

Time (UTC)

06:39

File name

X86_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7600.21146_none_1536fba6400ba594.manifest

File version

Not applicable

File size

12,632

Date (UTC)

07-Feb-2012

Time (UTC)

05:59

File name

X86_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7601.21917_none_173ef27e3d18a0e9.manifest

File version

Not applicable

File size

12,632

Date (UTC)

07-Feb-2012

Time (UTC)

06:36

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7600.21146_none_55b1e02b2e01a47b.manifest

File version

Not applicable

File size

2,413

Date (UTC)

07-Feb-2012

Time (UTC)

06:07

File name

X86_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7601.21917_none_57b9d7032b0e9fd0.manifest

File version

Not applicable

File size

2,413

Date (UTC)

07-Feb-2012

Time (UTC)

06:41

File name

X86_webdav-enable-ctl-a..rt-selection-regkey_31bf3856ad364e35_6.1.7600.21146_none_40e8aba523112334.manifest

File version

Not applicable

File size

1,619

Date (UTC)

07-Feb-2012

Time (UTC)

05:58

File name

X86_webdav-enable-ctl-a..rt-selection-regkey_31bf3856ad364e35_6.1.7601.21917_none_42f0a27d201e1e89.manifest

File version

Not applicable

File size

1,619

Date (UTC)

07-Feb-2012

Time (UTC)

06:36

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_003a9a7ad6a270da8df47b7d238ed3ef_31bf3856ad364e35_6.1.7601.21917_none_110f40e1f3b97587.manifest

File version

Not applicable

File size

711

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_076796a707d3a5d3bf3a2993a74f606f_31bf3856ad364e35_6.1.7600.21146_none_5fdc08d1503dd8a4.manifest

File version

Not applicable

File size

1,066

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_2dc1f9ad6df8beee710aab4f2c2c569d_31bf3856ad364e35_6.1.7600.21146_none_ea91fe62d467151e.manifest

File version

Not applicable

File size

710

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_3a0ce0a8259d2a9eea8640086feede99_31bf3856ad364e35_6.1.7601.21917_none_d6b50468dee589a9.manifest

File version

Not applicable

File size

1,065

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_4ae9aae8ab5c0acf462690b8b90f9454_31bf3856ad364e35_6.1.7601.21917_none_64b06d079dff6053.manifest

File version

Not applicable

File size

711

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_50facef018888011741c2dda8f85bc75_31bf3856ad364e35_6.1.7600.21146_none_12031d349215117e.manifest

File version

Not applicable

File size

1,065

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_610d7dd77b12f6099895d3926e18c747_31bf3856ad364e35_6.1.7601.21917_none_6caea2a8840fb5fc.manifest

File version

Not applicable

File size

722

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_86c2f1180d17fdfee8341e42d5f94718_31bf3856ad364e35_6.1.7600.21146_none_325fddb64985865f.manifest

File version

Not applicable

File size

1,418

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_8b27f4a1bd80ec5c09e83b7e8f73818a_31bf3856ad364e35_6.1.7600.21146_none_cc909fe9a75fa23d.manifest

File version

Not applicable

File size

722

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_9726d0445b7d724ae230702bbba1805b_31bf3856ad364e35_6.1.7600.21146_none_7eafed394e88bc7f.manifest

File version

Not applicable

File size

713

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_a63d8c1d2a7925f37694dd4b923c2a50_31bf3856ad364e35_6.1.7600.21146_none_a96efd5aeef4932f.manifest

File version

Not applicable

File size

711

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_c03e53c26225f972edc40378f4703a02_31bf3856ad364e35_6.1.7601.21917_none_9f017922f45dfb5a.manifest

File version

Not applicable

File size

1,418

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_cd083017de3ce0e625d333e15a904044_31bf3856ad364e35_6.1.7600.21146_none_bd9ec362d818d0d3.manifest

File version

Not applicable

File size

711

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_d91dcdd8d8e456b180e09c12ab898615_31bf3856ad364e35_6.1.7601.21917_none_2eee70ab4b081b7a.manifest

File version

Not applicable

File size

710

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_dc5a485d032a6a3b0b9ba786667b6dd5_31bf3856ad364e35_6.1.7601.21917_none_dc2594013f448f2d.manifest

File version

Not applicable

File size

1,066

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_fa257ec3f7dc2c1654f07809903ec593_31bf3856ad364e35_6.1.7601.21917_none_e4c5b86bb02bdc92.manifest

File version

Not applicable

File size

713

Date (UTC)

07-Feb-2012

Time (UTC)

10:27

File name

Amd64_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.1.7600.21146_none_f0781b3184ecacb4.manifest

File version

Not applicable

File size

4,115

Date (UTC)

07-Feb-2012

Time (UTC)

06:57

File name

Amd64_microsoft-windows-webdavredir-davclient_31bf3856ad364e35_6.1.7601.21917_none_f280120981f9a809.manifest

File version

Not applicable

File size

4,115

Date (UTC)

07-Feb-2012

Time (UTC)

07:33

File name

Amd64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7600.21146_none_71559729f86916ca.manifest

File version

Not applicable

File size

12,634

Date (UTC)

07-Feb-2012

Time (UTC)

06:53

File name

Amd64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7601.21917_none_735d8e01f576121f.manifest

File version

Not applicable

File size

12,634

Date (UTC)

07-Feb-2012

Time (UTC)

07:28

File name

Amd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7600.21146_none_b1d07baee65f15b1.manifest

File version

Not applicable

File size

2,417

Date (UTC)

07-Feb-2012

Time (UTC)

06:59

File name

Amd64_microsoft-windows-webdavredir-webclient_31bf3856ad364e35_6.1.7601.21917_none_b3d87286e36c1106.manifest

File version

Not applicable

File size

2,417

Date (UTC)

07-Feb-2012

Time (UTC)

07:35

File name

Amd64_webdav-enable-ctl-a..rt-selection-regkey_31bf3856ad364e35_6.1.7600.21146_none_9d074728db6e946a.manifest

File version

Not applicable

File size

1,621

Date (UTC)

07-Feb-2012

Time (UTC)

06:52

File name

Amd64_webdav-enable-ctl-a..rt-selection-regkey_31bf3856ad364e35_6.1.7601.21917_none_9f0f3e00d87b8fbf.manifest

File version

Not applicable

File size

1,621

Date (UTC)

07-Feb-2012

Time (UTC)

07:28

File name

Wow64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7600.21146_none_7baa417c2cc9d8c5.manifest

File version

Not applicable

File size

6,779

Date (UTC)

07-Feb-2012

Time (UTC)

05:53

File name

Wow64_microsoft-windows-webdavredir-mrxdav_31bf3856ad364e35_6.1.7601.21917_none_7db2385429d6d41a.manifest

File version

Not applicable

File size

6,779

Date (UTC)

07-Feb-2012

Time (UTC)

06:27

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