Event ID: 8206 occurs when a MAPI-based application modifies calendar items in Exchange 2003

On a Microsoft Exchange Server 2003-based server, applications that are based on custom MAPI or on Collaboration Data Objects (CDO) are used to modify calendar items. After many such changes, the following events are logged in the Application event log:

The following event may also be logged:

This problem occurs because a counter is incremented every time that a recurring meeting is modified. This counter eventually reaches a limit. This limit blocks additional modifications.

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.

Prerequisites

The following list contains prerequisites for the hotfix:

• Microsoft Exchange Server 2003 SP2

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the following services are stopped and then restarted when you apply this hotfix:

• Microsoft Exchange System Attendant
• Exchange Installable File System (ExIFS)
• IIS Admin service and all dependent services

Hotfix replacement information

This hotfix does not replace a previously released 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 item in Control Panel.

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

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the naming schema for Exchange software updates, click the following article number to view the article in the Microsoft Knowledge Base: