Poor performance, connectivity issues, and increased memory use occurs in Exchange Server 2003 when certain types of IMAP4 search requests are received

When Microsoft Exchange Server 2003 receives Internet Message Access Protocol, Version 4rev1 (IMAP4) search requests, one or more of the following symptoms may occur:

• Users experience poor performance when they are connected to Exchange Server 2003.
• Users cannot connect to Exchange Server 2003.
• The Information Store service (Store.exe) uses more memory than expected on the Exchange Server 2003 server.
• The Information Store service stops responding.
• Events that are similar to the following event are logged on the system event log on the Exchange Server 2003 server:

  
  Event ID: 9582
  Event Type: Error
  Event Source: MSExchangeIS
  Event Category: Performance
  Event ID: 9582
  Description: The virtual memory necessary to run your Exchange server is fragmented in such a way that normal operation may begin to fail. It is highly recommended that you restart all Exchange services to correct this issue.

Note The search requests that are discussed in this article are received from IMAP4 clients. IMAP4 clients include Microsoft Outlook and some mobile phones.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must have Microsoft Exchange Server 2003 installed.

Restart requirement

The Microsoft Exchange Server Information Store service is stopped and then restarted when you install this hotfix

Hotfix replacement information

This hotfix does not replace any other software updates.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

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

For more information, click the following article number to view the article in the Microsoft Knowledge Base: For more information, click the following article number to view the article in the Microsoft Knowledge Base: