The following events are logged in the Application event log in a Microsoft Exchange Server 2007 environment:

Event Type: Error
Event Source: EXCDO
Event Category: General
Event ID: 8206
Description: Calendaring agent failed with error code 0x80040215 while saving appointment.

Event Type: Error
Event Source: EXCDO
Event Category: General
Event ID: 8213
Description: Calendaring agent failed to update the free/busy cache during an appointment save or delete operation.

Event Type: Error
Event Source: EXCDO
Event Category: General
Event ID: 8199
Description: Calendaring agent failed in message save notification with error 0x800703eb on <someone>@<test.com>: /Calendar/xxxxxxxx.EML.

Additionally, many transaction logs are created. This situation causes the hard disk drive to become full, the stores to unmount, and cluster continuous replication (CCR) to stop functioning.

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This problem occurs if some mailboxes have more than 1,300 recurring appointments. EXCDO has a limit of 1,300 recurring appointments.

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To resolve this problem in Exchange Server 2007 Service Pack 1, install Update Rollup 1 for Exchange Server 2007 Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base: To resolve this problem in the release version of Exchange Server 2007, install Update Rollup 6 for Exchange Server 2007.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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

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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 Server software updates, click the following article number to view the article in the Microsoft Knowledge Base:

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