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

ID: q216647

The information in this article applies to:

Microsoft Commercial Internet System version 2.0

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

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.

RESOLUTION

Exchange Server 5.5

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

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

Commercial Internet System 2.0

A supported fix that corrects this problem is now available from Microsoft, but it has not been fully regression tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft Commercial Internet System version 2.0 service pack that contains this fix.

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 on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

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

Component: Chat Service

File name	Date	Time	Version	Size	Platform
Chatsvc.exe	2/4/99	9:00a	5.5.2552.0	396,560 bytes	x86
Chatsvc.exe	2/4/99	8:44a	5.5.2552.0	589,584 bytes	Alpha

STATUS

Microsoft has confirmed this to be 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: 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).

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.

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

Keywords : Mcis2Sp2fix EXC55SP3Fix
Version : winnt:2.0
Platform : winnt
Issue type : kbbug