Hi All We are seeing this error 4999 source MSEchange Common On Server 2008 R2 64Bit with Exchange 2007. Anyone seen this before? Thanks beforehand. Desc : Watson report about to be sent to dw20.exe for process id: 5156, with parameters: E12IIS, c-RTL-AMD64, 08.02.0176.002, WS, M.E.Data, M.E.D.SmtpAddress.IsValidSmtpAddress, System.ArgumentNullException, de65, 08.02.0176.000. ErrorReportingEnabled: False

This Error event indicates that one of the servers that is running Microsoft Exchange Server processes crashed. The process ID (PID) for this process is specified in the event description. 1st - Make sure the Exchange product is up to date if not please update the same and then give a try . This can be helpful http://social.technet.microsoft.com/Forums/en/exchangesvradmin/thread/82e68498-8758-461f-a69a-e0403de4726d http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/56fc17a2-23cb-42af-9b81-1c230f37f765 http://support.microsoft.com/kb/2536702 for the above error.

This Error event indicates that one of the servers that is running Microsoft Exchange Server processes crashed. The process ID (PID) for this process is specified in the event description. 1st - Make sure the Exchange product is up to date if not please update the same and then give a try . This can be helpful http://social.technet.microsoft.com/Forums/en/exchangesvradmin/thread/82e68498-8758-461f-a69a-e0403de4726d http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/56fc17a2-23cb-42af-9b81-1c230f37f765 http://support.microsoft.com/kb/2536702 for the above error.

Hi, You can follow the suggestions as amit mentioned above and then update. ThanksSophia Xu TechNet Community Support