DOCUMENT:Q163243 31-JUL-2000 [exchange] TITLE :XFOR: Causes for Event ID 4018 When Starting the IMC PRODUCT :Microsoft Exchange PROD/VER:winnt:4.0,5.0,5.5 OPER/SYS: KEYWORDS:kbusage exc4 exc5 exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 ------------------------------------------------------------------------------- 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: Q157042 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: Q147935 XFOR: Behavior of IMC With Invalid Registry Information Q186739 Events 4018 and 4116 Starting the Internet Mail Service Additional query words: mapi32 ====================================================================== Keywords : kbusage exc4 exc5 exc55 Technology : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2 Version : winnt:4.0,5.0,5.5 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.