The EdgeTransport.exe process crashes intermittently on an Exchange Server 2007 server

When the EdgeTransport.exe process crashes intermittently on a Microsoft Exchange Server 2007 server, the following events are logged in the Application log:

Source: MSExchange Common
Event ID: 4999
Task Category: General
Level: Error
Description:
Watson report about to be sent to dw20.exe for process id: <process ID>, with parameters: E12, c-RTL-AMD64, <version number>, edgetransport, M.E.D.Storage, M.E.D.S.VAlarm.get_TimeSpan, System.InvalidCastException, 6816, <version number>. ErrorReportingEnabled: False

Source: MSExchangeTransport
Event ID: 10003
Task Category: PoisonMessage
Level: Error
Description:
The transport process failed during message processing with the following call stack: System.InvalidCastException: Specified cast is not valid. at Microsoft.Exchange.Data.Storage.VAlarm.get_TimeSpan() at Microsoft.Exchange.Data.Storage.VEvent.PromoteReminder() at Microsoft.Exchange.Data.Storage.VEvent.Promote(Item item, ConversionAddressCache addressCache, Boolean suppressBodyPromotion) at Microsoft.Exchange.Data.Storage.VCalendar.Promote(Boolean suppressBodyPromotion) at Microsoft.Exchange.Data.Storage.CalendarDocument.ICalToItem(Stream iCalStream, Item item, InboundAddressCache addressCache, Boolean suppressBodyPromotion, String charsetName, String& errorMessage) at Microsoft.Exchange.Data.Storage.InboundMimeConverter.PromoteCalendarMessage() at Microsoft.Exchange.Data.Storage.InboundMimeConverter.ConvertToItemInternal(MimePromotionFlags promotionFlags) at Microsoft.Exchange.Data.Storage.ConvertUtils.CallCts(Trace tracer, String methodName, String exceptionString, CtsCall ctsCall) at Microsoft.Exchange.Data.Storage.InboundMimeConverter.ConvertToItem(MimePromotionFlags promotionFlags) at Microsoft.Exchange.Data.Storage.ItemConversion.InternalConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options, MimePromotionFlags promotionFlags, Boolean isStreamToStream) at Microsoft.Exchange.Data.Storage.ItemConversion.ConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options, MimePromotionFlags flags) at Microsoft.Exchange.Data.Storage.ItemConversion.ConvertAnyMimeToItem(Item itemOut, EmailMessage messageIn, InboundConversionOptions options) at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.CopyContentToItem(MailRecipient recipient) at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.<>c__DisplayClass1.<DeliverToRecipient>b__0() at Microsoft.Exchange.MailboxTransport.StoreDriver.StorageExceptionHandler.RunUnderExceptionHandler(IMessageConverter converter, StoreDriverDelegate workerFunction) at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.DeliverToRecipient(MailRecipient recipient) at Microsoft.Exchange.MailboxTransport.StoreDriver.MailItemDeliver.DeliverToRecipients() at Microsoft.Exchange.MailboxTransport.StoreDriver.StoreDriver.DeliverMailItem(NextHopConnection connection, TransportMailItem mailItem) at Microsoft.Exchange.MailboxTransport.StoreDriver.StoreDriver.LocalDeliveryCallback(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack) at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)

This issue occurs when a Microsoft Exchange Server 2007 server receives a message that contains a certain flag.

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.