XFOR: Causes for Event ID 4018 When Starting the IMC

 Last reviewed: March 12, 1998
Article ID: Q163243

The information in this article applies to:
  • Microsoft Exchange Server, version 4.0

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 <systemroot>\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:

    ARTICLE-ID: Q157042 

       TITLE :     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 more information, see the following article in the Microsoft Knowledge Base: 

   ARTICLE-ID: Q147935
   TITLE :     XFOR: Behavior of IMC With Invalid Registry Information

Additional query words: mapi32
Keywords : XFOR kbusage
Version : winnt:4.0
Platform : winnt

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Last reviewed: March 12, 1998
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