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Stumbled across this hotfix from Microsoft, for Application Center 2000 SP2 when it runs on Windows Server 2003 SP1.
The hotfix is needed when running Windows Server 2003 SP1, otherwise you could experience problems getting an AppCluster member into the AppCenter cluster.

After you install Windows Server 2003 SP1 on a server that is running Application Center 2000, you experience one or more of the following problems:

• When you try to connect to Localhost, you receive the following error message in your browser:
C014006d (cannot connect to server)
Additionally, the following error is logged in the System log:

Event ID 10010
Source: DCOM
The server {200691B9-C444-4089-8C61-247621196B15} did not register with DCOM within the required timeout

• When you try to add a member to the cluster, the wizard fails. When this problem occurs, you receive the following error message:
C014006d
Additionally, the following error is logged in the System log on the member:

Event ID:10010
Source: DCOM
The server {200691B9-C444-4089-8C61-247621196B15} did not register with DCOM within the required timeout.

• In the Application Center Management Console, the Member status and the Health Monitor status appear as “unknown.”

• The following error may be logged in the Application log:

Event ID: 5031
Source: Application Center
Class: MicrosoftAC_Replication_Session_Authentication_ConFailed_Event
Status: 0×80070005
StatusMessage: Access is denied.
DisplayName: Replication Session Authentication ConFailed

• When you try to designate a new cluster controller, the operation fails. When this problem occurs, you receive the following error message:
Unable to designate xxx as the cluster controller. The server is currently disabled. (0x8997053d).
Additionally, the following error is logged in the Application log:

Event Id: 4021
Source: Application Center
CLASS: MicrosoftAC_Cluster_Controller_ChangeFailed_Event
Status: 0x8007053d
StatusMessage: The server is currently disabled.
DisplayName: Cluster Controller ChangeFailed

• Microsoft COM+ applications that should be instantiated on the Component Load Balancing (CLB) cluster are instead instantiated locally.

• The Restart IIS option on the All tasks server menu fails, and you receive the following error message:
Class Not registered

The following error message may be logged in the application event log:
Event ID: 1023
Source: Perflib
Description: Windows cannot load extensible counter DLL MSSQL$MSAC, the first DWORD in data section is the Windows error code.

Download it at source: HOTFIX – KB891330.

Bernard has done his usual post, with an overview of this month IIS webcasts.

See the full list at source: Webcasts – December 2005.

Direct link to: Microsoft IIS Webcast site.

Chris Adams has posted another article (part III) in his SSL series.

…focus on certificates, and in particular, how you can build certificates and also how to troubleshoot certificates. It is important to understand the different types of certificates that exist, and what environment to use them in.

Read it at source: ChrisAd’s blog : SSL Part III.

For more information on his first articles in the SSL series, see my previous post: SSL.