Topic Last Modified: 2005-11-18

The Microsoft® Exchange Server Analyzer Tool reads the following registry entry to determine whether Symantec AntiVirus Corporate Edition (Symantec AV) is installed on the Exchange Server, and RealTime Protection (RTP) is enabled:


If the Exchange Server Analyzer finds that the HaveExceptionDirs registry value is set to 0, the Exchange Server Analyzer displays an error. A HaveExceptionDirs registry value of 0 indicates that folder exclusions are disabled.

Folder exclusions prevent specific folders from being scanned during real-time antivirus scanning. If you have not enabled folder exclusions on your Exchange Server, the following problems can occur:

You must never run file-based scanning software against Exchange Server databases, logs, temporary files, Internet Information Services (IIS) system files, or the installable file system (IFS) drive (drive M). Configure antivirus software to avoid scanning the folders that contain these files.

You can run file-based antivirus software against the operating system of the Exchange Server computer and against Exchange Server program files (the Exchsrvr\Bin folder). However, do not run file-based antivirus software against the following files and folders:

You can run file-based scanning against the following folders:

For detailed information about how to configure exclusions on RealTime scanning in Symantec AntiVirus Corporate Edition, see the Symantec antivirus Web site (

Web addresses can change, so you might be unable to connect to the Web site or sites that are mentioned here.

For more information about fortifying an Exchange Server environment against e-mail transmitted viruses and worms, see "Slowing and Stopping E-Mail Viruses in an Exchange Server 2003 Environment" (

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 that is available for Exchange Server, see the Exchange Server Partners: Antivirus Web site (