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After you apply one of the following update rollups for Microsoft Exchange Server 2007 Service Pack 1, the MSExchangeIMAP4 service may crash intermittently:
Update Rollup 4 for Exchange Server 2007 Service Pack 1
Update Rollup 5 for Exchange Server 2007 Service Pack 1
Update Rollup 6 for Exchange Server 2007 Service Pack 1
Additionally, the following event may be logged in the Application log:
Event Type: Error Event Source: MSExchange Common Event Category: General Event ID: 4999 Description: Watson report about to be sent to dw20.exe for process id: <ID>, with parameters: E12, RTL-AMD64, 08.01.0338.000, M.E.Imap4, M.E.D.Common, M.E.D.G.OutboundCodePageDetector.AddText, System.ArgumentNullException, 3e79, 08.01.0338.000. ErrorReportingEnabled: True For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
To resolve this problem, apply Update Rollup 7 for Exchange Server 2007 Service Pack 1. For more information about Update Rollup 7 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic: