Load Balancing Update Required

[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 http://go.microsoft.com/fwlink/?linkid=34707.]  

Topic Last Modified: 2008-12-09

The Microsoft Exchange Analyzer Tool queries the CIM_Datafile Microsoft Windows® Management Instrumentation (WMI) class to determine the version of the LBService.dll file.

If the Exchange Analyzer determines that the version number for the LBService.dll file is less than 6.0.6001.22276, the Exchange Analyzer displays an error.

This error means that an update is required for the load balancing functionality of Microsoft Exchange Client Access servers to work correctly with Outlook Anywhere.

To address this error, you must download and install the Exchange Server hotfix that is described in Microsoft Knowledge Base article 958178, "A Windows Server 2008 update lets you use the RPC redirection (RDR) interface to enable or disable custom load balancing based on server name and port number" (http://go.microsoft.com/fwlink/?LinkId=3052&kbid=958178).