Microsoft KB Archive/245542

= OL2000: COM Add-in Creates Duplicate Menu Items =

Article ID: 245542

Article Last Modified on 2/28/2004

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APPLIES TO


 * Microsoft Outlook 2000 Standard Edition

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This article was previously published under Q245542



SYMPTOMS
You create an COM Add-in for Outlook 2000 that adds menu commands, but duplicate menu commands appear when you switch folders in Outlook.



CAUSE
There is also an Exchange Client Extension installed that adds a menu command, and Outlook does not handle this situation correctly.



RESOLUTION
This problem was fixed in Outlook 2002.



WORKAROUND
Use one of the following methods to work around this problem:  Do not use the Exchange Client Extension that causes a conflict. To determine what extensions are being used by Outlook:  On the Tools menu, click Options. Click the Other tab, click Advanced Options, and then click Add-in Manager.  Instead of adding a command to an existing menu, add your own top-level menu to avoid generating a conflict with an Exchange Client Extension. Instead of developing a COM add-in, create an Exchange Client Extension to avoid the conflict. However, Exchange Client Extensions need to be developed in C/C++. For more information about developing an extension, see the following Microsoft Web site:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/exchcli/html/_mapi1book_about_client_extensions.asp

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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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