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Message items rescanned in the background in an Exchange Server 2010 environment

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You have deployed an antivirus solution that uses Microsoft Exchange Virus Scanning API (VSAPI) in a Microsoft Exchange Server 2010 environment.
  • The antivirus application running on the Microsoft Exchange Server 2010 Hub Transport server scans email messages.
  • The Hub Transport server performs a virus scan and stamps the email messages when they are received.
In this scenario, the background scanner unexpectedly rescans email messages on the Microsoft Exchange Server 2010 Mailbox server.

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Cause

This issue occurs because the BackgroundScanningIgnoreStamp registry key is not explicitly set to 0 when the Microsoft Exchange Information Store initializes the background scanning process. The BackgroundScanningIgnoreStamp registry key set to 0 means that items that are scanned in the Hub Transport server should not be rescanned.


Note To view the BackgroundScanningIgnoreStamp registry key, locate the following subkey in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\VirusScan

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Resolution

To resolve this issue, install the following update rollup:
2645995 Description of Update Rollup 1 for Exchange Server 2010 Service Pack 2

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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More Information

For more information about the antivirus deployment, visit the following Microsoft website:
General information about the antivirus deployment

For more information about the Pickup and Replay directories, visit the following Microsoft website:
General information about the Pickup and Replay directories


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Keywords: kbqfe, kbfix, kbexpertiseinter, kbsurveynew, kb

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Article Info
Article ID : 2632206
Revision : 1
Created on : 1/7/2017
Published on : 2/13/2012
Exists online : False
Views : 315