The number of threads for the store process is high

[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: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool queries the Win32_Process Microsoft Windows® Management Instrumentation (WMI) class to determine the value of the ThreadCount for the Exchange information store process. This value represents the number of active store threads on the server. If there are more than 400 active store threads, a warning message is displayed.

The most common cause of this problem is incompatible antivirus software running on the same computer.

To correct this warning

  1. Check with your vendor to be sure that you are running up-to-date and Exchange-compatible antivirus software.

  2. Update your antivirus software.

For more information about antivirus software and Exchange Server 2003, see the Microsoft Knowledge Base article 823166, "Overview of Exchange Server 2003 and antivirus software" (