A MAPI application crashes on an Exchange Server 2003 server

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SYMPTOMS

When you run a MAPI application on an Exchange Server 2003 server, the application may crash.

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CAUSE

This issue occurs because the memory is not correctly allocated in MAPI. The allocation causes an Access Violation error 0xc0000005.

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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 the problem described in this article. 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:

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

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

This hotfix requires Microsoft Exchange Server 2003 Service Pack 2 to be installed on the server because of file dependencies. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

836993 (http://support.microsoft.com/kb/836993/ ) How to obtain the latest service packs for Exchange Server 2003

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the Microsoft Exchange System Attendant service is restarted when you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 item in Control Panel.

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File name	File version	File size	Date	Time
Mapi32.dll	6.5.7653.20	636,928	14-Nov-2007	17:30

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STATUS

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

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MORE INFORMATION

When this issue occurs, the following call stack is generated:

0d7afb48 7c81e85e 3003001f 1cee9000 0d7afb74 ntdll!RtlpCoalesceFreeBlocks+0x128
0d7afb80 7c81e4ef 06190000 00002928 00002920 ntdll!RtlpExtendHeap+0x2bc
0d7afdac 61e357d3 01190000 00000000 00002920 ntdll!RtlAllocateHeap+0x645
0d7afdcc 61e35820 00000001 01190000 0d7afe68 mapi32!MAPIAllocateBufferExt+0x34
0d7afde0 61e4835f 00002918 0d7afe68 0d7afec8 mapi32!MAPIAllocateBuffer+0x26
0d7afdf8 005088ca 00000063 0113d5b8 0049b58a mapi32!ScDupPropset+0x22
......
<MAPI Application calls>
......
0d7affec 00000000 00716352 07bbb0f8 00000000 kernel32!BaseThreadStart+0x34

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