Microsoft KB Archive/216647

= XFOR: MCIS 2.0 Chat Service Incorrectly Allows Users to Change Nickname =

Article ID: 216647

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Commercial Internet System 2.0

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This article was previously published under Q216647



IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
If a chat user connects to a MCIS 2.0 Chat Server computer and attempts to change their nickname, the nickname change is incorrectly allowed.



CAUSE
A logic problem incorrectly allowed the user to change their nickname.



Exchange Server 5.5
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

Commercial Internet System 2.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft Commercial Internet System version 2.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

Component: Chat Service



STATUS
Microsoft has confirmed that this is a problem in Microsoft Commercial Internet System version 2.0. This problem was first corrected in Exchange Server 5.5 Service Pack 3.



MORE INFORMATION
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

After you install the new Chatsvc.exe file on the servers, you will need to add the following registry key to change the behavior so users will not be allowed to change their password. To do this, perform the following steps:

 Start Registry Editor (Regedt32.exe). Locate the following key in the registry:

HKLM\Software\Microsoft\Exchange\ChatSvc\Parameters

  On the Edit menu, click Add Value, and then add the following registry value:      Value Name: DisableNickChange Data Type: REG_DWORD Value: 1  Quit Registry Editor.</li></ol>

Additional query words: mcis hotfix hot fix qfe quick engineering patch

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB216647

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