DOCUMENT:Q270677  06-AUG-2002  [exchange]
TITLE   :XADM: Event Service Does Not Start and Error 0x80040154 Appears
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

The Exchange 5.5 Event Service fails to start.

The following Event ID appears in the application event log:

   Event ID: 5
   Source: MSExchangeES
   Type: Error
   Description: An unexpected MAPI error occurred 0x80040154

CAUSE
=====

Error 0x80040154 signifies that there is an unregistered .dll file.

RESOLUTION
==========

To resolve this issue, reregister the Event Service .dll files using regsvr32;
to do so, follow these steps:

1. Go to the command prompt, and change directories to the Exchsrvr\bin
   subdirectory.

2. Enter the following command

   regsvr32 <Filename>.dll

   where <Filename> is the name of the .dll file (such as "Scripto.dll").

3. Run the command on the following .dll files:

   Scripto.dll
   Ss.dll
   Esconf.dll

WORKAROUND
==========

When the Event Service fails to start and the error "0x80040154" appears,
reinstalling the Microsoft Outlook client on the Exchange server allows the
service to start.

To reinstall the Outlook client on an Exchange server, follow these steps:

1. Stop all the Exchange services, and then set the Exchange System Attendant to
   Disabled.

2. Stop and disable all third party services such as monitoring agents, backup
   programs, and antivirus programs.

3. Stop the SNMP service.

4. Close all programs.

5. Restart the server.

6. Reinstall the Outlook client on the server.

7. Change the Exchange System Attendant startup back to Automatic.

8. Start the Exchange Services manually except for the Exchange Event Service.

9. Start the Exchange Event Service manually.

Additional query words:

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Keywords          : exc55 
Component         : Admin
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbprb

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