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A memory leak occurs when you run the Incremental Change Synchronization API in a loop in Exchange Server 2003

This article has been archived. It is offered "as is" and will no longer be updated.
In Microsoft Exchange Server 2003, when you programmatically run the Incremental Change Synchronization (ICS) API in a loop to synchronize information in the Exchange Information Store, your program eventually stops responding or quits. In this scenario, your program receives the following error code from the Exchange Server computer:
This problem may occur after you install the hotfix that is described in the following Microsoft Knowledge Base article:
843523 Memory leak occurs when you run a program that uses the incremental change synchronization API on your Exchange Server 2003 computer
This problem occurs because of a memory leak that occurs in the ICS object in Emsmdb32.dll. In this scenario, when you run ICS, every one of the ICS download synchronization operations uses memory. However, these operations do not release that memory. Therefore, when you run ICS in a loop, the program eventually runs out of memory.

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.


Because of file dependencies, you must have Microsoft Exchange Server 2003 Service Pack 1 (SP1) installed to apply this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
836993 How to obtain the latest service packs for Exchange Server 2003

Restart requirement

You do not have to restart your computer after you apply this hotfix. However, the following Exchange services are automatically restarted when you install this hotfix:
  • Microsoft Exchange MTA Stacks
  • Microsoft Exchange Information Store
  • Microsoft Exchange System Attendant

Hotfix replacement information

This hotfix does not replace any other hotfix.

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   --------------------------------------------------------------   02-Oct-2004  01:14  6.5.7232.41       975,872  Emsmdb32.dll   
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 numbers to view the articles in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
817903 New naming schema for Exchange Server software update packages

Article ID: 887828 - Last Review: 01/15/2015 00:58:53 - Revision: 3.3

Microsoft Exchange Server 2003 Standard Edition, Microsoft Exchange Server 2003 Enterprise Edition

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