You notice high CPU usage when the IMAP service is running on an Exchange 2007 Service Pack 1 server that has the CAS role

Article translations Article translations
Article ID: 955462 - View products that this article applies to.
Expand all | Collapse all

SYMPTOMS

On a Microsoft Exchange Server 2007 Service Pack 1 (SP1) server that has the Client Access server (CAS) role, you may notice high CPU usage when the IMAP4 service is running. As a result, the client computer may not be able access the server, or it may get a slow response from the server.

CAUSE

This issue occurs because the Microsoft.Exchange.Imap4.exe process falls into an inefficient loop when Exchange Server 2007 processes some search operations.

RESOLUTION

To resolve this problem, install Update Rollup 7 for Exchange 2007 Service Pack 1.

For more information about Update Rollup 7 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic:
Description of Update Rollup 7 for Exchange Server 2007 Service Pack 1
For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:
How to Obtain the Latest Service Pack or Update Rollup for Exchange 2007
Note This hotfix also improves the performance of the IMAP SEARCH command.

STATUS

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

Properties

Article ID: 955462 - Last Review: March 18, 2009 - Revision: 1.1
APPLIES TO
  • Microsoft Exchange Server 2007 Service Pack 1, when used with:
    • Microsoft Exchange Server 2007 Standard Edition
    • Microsoft Exchange Server 2007 Enterprise Edition
Keywords: 
kbhotfixrollup kbsurveynew kbexpertiseinter kbqfe KB955462

Give Feedback

 

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from smallbusiness.support.microsoft.com