Lots of LDAP queries occur, and e-mail message queues start to form in Forefront Security for Exchange Server

Article ID: 961432 - View products that this article applies to.
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SYMPTOMS

On a Microsoft Exchange Server server that is running Microsoft Forefront Security for Exchange Server, you may notice mail queues start to form. If you perform a Performance Monitor analysis, you may notice lots of Lightweight Directory Access Protocol (LDAP) queries.
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CAUSE

Remote procedure call (RPC) threads may become unavailable if there are lots of LDAP queries. The unavailability of RPC threads causes e-mail messages to queue up.
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WORKAROUND

To workaround this problem, disable Content Filtering for the Realtime scan job. To do this, follow these steps:
  1. In the Forefront Server Security Administrator client, click Operate, and then click Run job.
  2. Click Realtime Scan Job, and then click to clear the Content Filtering check box.
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RESOLUTION

To resolve this problem, install Forefront Security for Exchange Server with Service Pack 2 (SP2).

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
960465
(http://support.microsoft.com/kb/960465/ )
Description of Forefront Security for Exchange Server with Service Pack 2
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Properties

Article ID: 961432 - Last Review: July 1, 2009 - Revision: 1.0
APPLIES TO
  • Microsoft Forefront Security for Exchange Server Service Pack 1, when used with:
    • Microsoft Forefront Security for Exchange Server
  • Microsoft Forefront Security for Exchange Server
Keywords: 
kbprb kbqfe kbexpertiseinter kbsurveynew KB961432
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