Microsoft KB Archive/184731

= XADM: MMC Does Not Run after Microsoft Exchange Chat Service 5.5. SP1 Is Installed on a Backup Domain Controller =

Article ID: 184731

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange Server 5.5 Service Pack 1
 * Microsoft Commercial Internet System 2.0

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This article was previously published under Q184731



IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.



SYMPTOMS
After you install the Microsoft Exchange Chat Service 5.5 Service Pack 1 or Microsoft Commercial Internet System Chat 2.0 on a Backup Domain Controller (BDC), the Microsoft Management Console (MMC) does not run. The following error message appears:

An application error has occurred and an application error log is being generated

mmc.exe

Exception access violation (0xc000005) Address 0x10021433



CAUSE
This error occurs because the Chat Administrator Account is not created as a local account on the Backup Domain Controller.



RESOLUTION
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

To correct this problem, export and then merge the Chat Administrator Key from a Primary Domain Controller (PDC) or Member Server to the BDC. To export the key, perform the following steps:

  Start Registry Editor (REGEDT32.exe), and go to the following subkey:

     HKEY_LOCAL_MACHINE\Software\Microsoft\Exchange\ChatSvc \Parameters\Accounts

NOTE: The above registry key is one path; it has been wrapped for readability.  Select Chat Administrator. From the Registry menu, click Export Registry File. Type a File Name and then click Save. Save the file to either the hard disk or a floppy disk. Copy this file to the Backup Domain Controller.</li> Double-click on the file in Windows Explorer and the registry key will be added.</li></ol>

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WORKAROUND
To work around this problem, install the registry key (see the Resolution section above), and then install the Microsoft Exchange Chat Service. The MMC functions properly after these steps have been completed.

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STATUS
Microsoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article.

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MORE INFORMATION
This is not a problem when the Microsoft Exchange Chat Service is installed on a Primary Domain Controller or a Member Server.

Additional query words: mcischat

Keywords: kbbug kbpending KB184731

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