Cluster update required (KB921181)

[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: 2006-08-11

Microsoft® Exchange Server 2007 setup cannot continue because an update to the cluster node is required.

Exchange 2007 setup requires that the cluster node update referred to in Microsoft Knowledge Base article 921181 be installed.

To resolve this issue, install the update referred to in Microsoft Knowledge Base article 921181, "An update is available that adds a file share witness feature and a configurable cluster heartbeats feature to Windows Server 2003 Service Pack 1-based server clusters" (, and then rerun Exchange 2007 setup.