A third-party MAPI program stops responding, and Exchange Server 2003 intermittently does not deliver messages

Hotfix Download Available
View and request hotfix downloads

View products that this article applies to.

SYMPTOMS

When you use a third-party MAPI program in Microsoft Exchange Server 2003, over time, the third-party MAPI program stops responding. Additionally, Exchange Server 2003 intermittently does not deliver messages. During this period, if you monitor memory usage for the MAPI program, you find that there is a steady increase in memory usage until no free system memory is available. Eventually, you have to restart the Microsoft Exchange Information Store service (Store.exe) to resume using the MAPI program and the Exchange messaging services.

Back to the top

CAUSE

This problem occurs if the third-party MAPI program logs on to a mailbox and then makes repeated calls to the OpenMsgStore method to open additional Exchange mailboxes. Memory is leaked in each call until no free system memory is available.

Back to the top

RESOLUTION

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:

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

Microsoft Exchange Server 2003 Service Pack 1 (SP1) must be installed before you install the hotfix.

Restart requirement

You do not have to restart the computer after you install the 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 tool in Control Panel.

   Date         Time   Version            Size    File name
   --------------------------------------------------------------
   08-Jul-2005  02:02  6.5.7233.36     1,320,960  Emsmdb32.dll

Back to the top