Poor performance, connectivity issues, and increased memory use occurs in Exchange Server 2003 when certain types of IMAP4 search requests are received (904159)

SYMPTOMS

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.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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.

   Date         Time   Version       Size       File name
   -------------------------------------------------------    
   06-Aug-2005  01:53  6.5.7233.41   3,270,144  Mdbmsg.dll       
   04-Jun-2005  01:56                    3,304  Redir.asp
   06-Aug-2005  02:27  6.5.7233.41   5,177,344  Store.exe

MORE INFORMATION

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

824684 Description of the standard terminology that is used to describe Microsoft software updates