The Microsoft.Exchange.IMAP4.exe process crashes when an IMAP4 client retrieves a meeting request that includes exception attachments in an Exchange Server 2007 environment

The Microsoft.Exchange.IMAP4.exe process crashes when an IMAP4 client retrieves a meeting request that includes exception attachments in a Microsoft Exchange Server 2007 environment. Additionally, the following event is logged in the Application log:

Log Name: Application
Source: MSExchange Common
Event ID: 4999
Task Category: General
Level: Error
Keywords: Classic
User: N/A
Description:
Watson report about to be sent to dw20.exe for process id: <ID>, with parameters: E12, c-RTL-AMD64, <version>, M.E.Imap4, M.E.Imap4, M.E.I.Imap4Message.GetBodyStructure, System.NullReferenceException, <callstackHash>, <version>. ErrorReportingEnabled: False

To resolve this problem, install the following update rollup:

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

An exception attachment indicates a meeting exception is included in a meeting request as an attachment.