An important update for Microsoft COM+ server is available

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at]  

Topic Last Modified: 2010-01-14

The Microsoft Exchange Analyzer Tool reads the version number of the following file to determine whether Microsoft Windows Server 2003 COM+ 1.5 hotfix rollup package 12 has been installed:


Exchange Analyzer determines if all the following conditions are true:

  • The system is running Windows 2003 Service Pack 2 (SP2).

  • The Cluster service is running.

  • The Exchange server is not an Exchange Server 2003 Front-End server. (However, the server can be an Exchange Server 2003 Back-End server.)

  • The version of the Rpcss.dll file is earlier than 5.2.3790.4045.

If these conditions are all true, you receive the following message:

COM+ 1.5 hotfix rollup package is available. An important update for Microsoft COM+ server is available on server Exchange_Server_Name. See Microsoft Knowledge Base article 934016 for further information.

To address this message, see Microsoft Knowledge Base article 934016, "Availability of Windows Server 2003 Post-Service Pack 2 COM+ 1.5 Hotfix Rollup Package 12" (