Microsoft KB Archive/901014

= You experience memory leaks when your custom program loads and unloads the Mapi32.dll file on Exchange Server 2003 =

Article ID: 901014

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Enterprise Edition
 * Microsoft Exchange Server 2003 Standard Edition

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SYMPTOMS
Consider the following scenario. You install the hotfix that is described in the following Microsoft Knowledge Base article to fix memory leaks that you are experiencing in Microsoft Exchange Server 2003:

891509 A memory leak condition occurs when you create a CDO program or a MAPI32 program to log on or log off many mailboxes in Exchange Server 2003 S891509

The memory leaks that you are experiencing are caused by one of the following programs:
 * A custom MAPI program
 * A Collaboration Data Objects (CDO) program

After you install the hotfix, you may notice that the memory leaks have decreased. However, in this scenario, memory leaks still continue to occur when your custom program repeatedly calls the LoadLibrary and FreeLibrary functions to load and unload the Mapi32.dll file.

Note You can use the Performance snap-in to view the memory leaks in the Private Bytes counter of the program that is experiencing the memory leaks.



Hotfix information
A supported hotfix is now 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 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
Because of file dependencies, this hotfix requires Microsoft Exchange Server 2003 Service Pack 1 (SP1).

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.

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 31-Aug-2005 04:02  6.5.7233.46  635,904  Mapi32.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
You must set the  registry value to 1 to enable the MAPI heap cleanup code.

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

891509 A memory leak condition occurs when you create a CDO program or a MAPI32 program to log on or log off many mailboxes in Exchange Server 2003 Service Pack 1

Additional query words: XCCC

Keywords: kbfix kbtshoot kbhotfixserver kbqfe KB901014

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