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:
2407025 Description of Update Rollup 2 for Exchange Server 2007 Service Pack 3
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.