Microsoft KB Archive/163243

= XFOR: Causes for Event ID 4018 when starting the IMC =

Article ID: 163243

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition
 * Microsoft Exchange Server 5.0 Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q163243



SYMPTOMS
When you start the Internet Mail Connector (IMC), you may receive the following error message:

Error 2140: An internal Windows NT error occurred.

The following event is logged in the application event log:

  Event ID: 4018 Type: Error Source: MSExchangeIMC Category: Initialization/Termination Description:

Unable to start the Internet Mail Connector service because MAPI could not be initialized.



CAUSE
If you receive this error, check the following:

 Verify that Mapisvc.inf is located in the proper folder. It should be in the %System Root%\System32 folder. Verify that the Exchange Service Account has at least change rights on the Mapisvc.inf file in the \System32 folder. Verify that you have a private information store on that server. For more information, see the following article in the Microsoft Knowledge Base:

157042 Event ID 4018 if IMC Started Without Private IS

  Verify that the CommonName and HomeDSA registry entries are present and valid. They will be listed under:   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIMC \Parameters 

For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

147935 XFOR: Behavior of IMC With Invalid Registry Information

186739 Events 4018 and 4116 Starting the Internet Mail Service

Additional query words: mapi32

Keywords: kbprb kbusage KB163243

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