Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool reads the following registry value to determine whether a Virus Scanning Application Programming Interface (VSAPI) library file is registered with the Microsoft Exchange Information Store service:


When McAfee GroupShield 6.0 for Microsoft Exchange is installed on Exchange 2000 Server or Exchange Server 2003, the Library registry entry will have a value of VSAPISCANSOURCE.DLL. This library file performs several VSAPI-related functions in GroupShield 6.0 for Microsoft Exchange.

The Exchange Server Analyzer also queries the CIM_Datafile Microsoft Windows® Management Instrumentation (WMI) class to determine the value of the Version key for VSAPISCANSOURCE.DLL. If the value for the Version key indicates that the build number is less than 6.0.1148.0 for this file, a warning is displayed.

A version number of less than 6.0.1148.0 for VSAPISCANSOURCE.DLL indicates that the latest version of GroupShield 6.0 for Microsoft Exchange is not installed. A software update is available for GroupShield 6.0 for Microsoft Exchange from the McAfee Web site. This update is highly recommended and can improve overall performance and reliability.

To correct this warning
  1. Determine the latest version of GroupShield 6.0 for Microsoft Exchange by visiting the Guided Knowledge Search page of the McAfee Web site ( Use the following McAfee Solutions articles and other McAfee Solutions articles located on that site to determine the latest version:

    • Solution ID nai18117 "Product Version Information for GroupShield for Exchange 2000"

    • Solution ID KB37636, "Version numbers for McAfee GroupShield 6.x for Microsoft Exchange"

    • Solution ID KB40567, "Getting the latest version of GroupShield and/or SpamKiller"

  2. Visit the Product Downloads page of the McAfee Web site (

  3. Download the latest update for your version of GroupShield 6.0 for Microsoft Exchange.

  4. Take a full backup of the Exchange Server computer.

  5. Install the latest update to GroupShield 6.0 for Microsoft Exchange.

The third-party Web site information in this topic is provided to help you find the technical information you need. The URLs are subject to change without notice.

For more information about how to use antivirus software with Exchange Server, see the following Microsoft Knowledge Base articles:

For a list of third-party antivirus software available for Exchange Server, see the Exchange Server Partners: Antivirus Web site (