When the Autodiscover service detects an authentication error in a Microsoft Exchange Server 2010 environment or in another environment, a crash occurs in the Autodiscover application pool. Additionally, Event ID 4999 is logged. The following is a sample of the event that is logged when this issue occurs:
Time: Time ID: 4999 Level: Error Source: MSExchange Common Machine: Machine Name Message: Watson report about to be sent for process id: Process ID, with parameters: E12, c-RTL-AMD64, 14.02.0247.005, AutoDisc, M.Exchange.Autodiscover, M.E.A.W.LegacyErrorHandler.HandleError, S.S.Diagnostics.CallbackException, 7eb3, 14.02.0247.003. ErrorReportingEnabled: True
This issue occurs because the System.ServiceModel.Diagnostics.CallbackException function in the Microsoft.Exchange.Autodiscover.WCF.LegacyErrorHandler.ReportException function stops responding.
To resolve this issue, install the following update rollup:
2685289 Description of Update Rollup 3 for Exchange Server 2010 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.