Windows Server 2008 R2-based NDES server cannot submit a certificate request after you restart a server on which an enterprise CA is installed

S’applique à : Windows Server 2008 R2 Service Pack 1Windows Server 2008 R2 DatacenterWindows Server 2008 R2 Enterprise


Consider the following scenario:
  • You install an enterprise certification authority (CA) on a server (server A) in a domain environment.
  • You configure the enterprise CA as a CA for a registration authority.
  • You restart server A.
  • You install the Network Device Enrollment Service (NDES) role service on another server (server B) that is running Windows Server 2008 R2.
  • You send a Simple Certificate Enrollment Protocol (SCEP) request by using a network device or SCEP simulator on server B.
  • Server B tries to submit a certificate request to the enterprise CA.
In this scenario, server B cannot submit the certificate request. Additionally, an event that resembles the following is logged on the NDES server:


This issue occurs because the Certcli.dll file maintains the cached state of the current DCOM connections to the CA. When you restart server A, the cached state of the connections is no longer valid.


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 website: Note 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 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 this hotfix, 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.


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