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
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