You are prompted to select a certificate when you connect to a wireless network in Windows 7 or in Windows Server 2008 R2

Consider the following scenario:

  • You use user certificate authentication for wireless or wired 802.1x connections on a Windows 7-based or Windows Server 2008 R2-based computer.

  • A user certificate that does not contain a user principal name (UPN) value in the Subject Alt Name (SAN) field (for example, a Lync 2010 self-signed certificate) is installed on the computer.

  • You try to connect to the network.

In this scenario, a dialog box appears and prompts you to select a certificate from the certificate store. Additionally, the authentication processĀ is not successful if you do not select the correct certificate.

This issue occurs because the Simple Certificate Selection (SCS) components cannot simplify the certificates. Therefore, the SCS components cannot select which certificate to use for Extensible Authentication Protocol (EAP) wireless authentication.

To resolve this issue, install the following update. After you install this update, the SCS algorithm ignores certificates that do not contain a UPN value in the SAN field when the algorithm simplifies multiple user certificates. Therefore, the algorithm will ignore Lync 2010 certificates when you try to connect to a wireless network.

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 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.

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

To apply this hotfix, you do not have to make any changes to the registry.

You must restart the computer after you apply this hotfix.

This hotfix does not replace a previously released hotfix.

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.


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, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    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 7 and for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

File name

File version

File size

Date

Time

Rastls.dll

6.1.7600.21209

372,736

08-May-2012

04:37

Rastls.dll

6.1.7601.21989

372,736

08-May-2012

04:24

File name

File version

File size

Date

Time

Rastls.dll

6.1.7600.21209

424,960

08-May-2012

05:30

Rastls.dll

6.1.7601.21989

424,960

08-May-2012

05:19

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

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

The SCS component tries to simplify all user certificates to a single group based on the UPN value of the SAN field in each certificate. For more information about the deployment, technology, and components of wireless LANs, go to the following Microsoft website:

General information about the deployment, technology, and components of wireless LANs

File name

X86_3ea3dcfd4cde1300e99af71626de6714_31bf3856ad364e35_6.1.7600.21209_none_dd0aa279693ec8d9.manifest

File version

Not applicable

File size

694

Date (UTC)

09-May-2012

Time (UTC)

12:21

File name

X86_52c4586860dcacf77d30e076ca76ec86_31bf3856ad364e35_6.1.7601.21989_none_b2629d7214100117.manifest

File version

Not applicable

File size

694

Date (UTC)

09-May-2012

Time (UTC)

12:21

File name

X86_microsoft-windows-rastls_31bf3856ad364e35_6.1.7600.21209_none_6d1f84d0ca50baaf.manifest

File version

Not applicable

File size

4,741

Date (UTC)

08-May-2012

Time (UTC)

05:45

File name

X86_microsoft-windows-rastls_31bf3856ad364e35_6.1.7601.21989_none_6eaf8a54c7b7d2e1.manifest

File version

Not applicable

File size

4,741

Date (UTC)

08-May-2012

Time (UTC)

05:28

File name

Amd64_445e7d22a5f3c9c2cde12bf460b50a01_31bf3856ad364e35_6.1.7600.21209_none_dd21470cf718c062.manifest

File version

Not applicable

File size

698

Date (UTC)

09-May-2012

Time (UTC)

12:21

File name

Amd64_48259e0da8b5e084e35e60bea0b9c06f_31bf3856ad364e35_6.1.7600.21209_none_cf5566f4a0c04eb7.manifest

File version

Not applicable

File size

1,036

Date (UTC)

09-May-2012

Time (UTC)

12:21

File name

Amd64_f10d52c7e72642e2c7f5830a735febfb_31bf3856ad364e35_6.1.7601.21989_none_5c0ccc10488b5db1.manifest

File version

Not applicable

File size

698

Date (UTC)

09-May-2012

Time (UTC)

12:21

File name

Amd64_f20130464a71089d727ffa15a3d542a0_31bf3856ad364e35_6.1.7601.21989_none_5059f51a2363a7e2.manifest

File version

Not applicable

File size

1,036

Date (UTC)

09-May-2012

Time (UTC)

12:21

File name

Amd64_microsoft-windows-rastls_31bf3856ad364e35_6.1.7600.21209_none_c93e205482ae2be5.manifest

File version

Not applicable

File size

4,745

Date (UTC)

08-May-2012

Time (UTC)

06:42

File name

Amd64_microsoft-windows-rastls_31bf3856ad364e35_6.1.7601.21989_none_cace25d880154417.manifest

File version

Not applicable

File size

4,745

Date (UTC)

08-May-2012

Time (UTC)

06:52

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