Exchange 2003 – Cannot access System Manager (throws MAPI32.dll Q266418 error Popup)

I found this problem opening Exchange 2003 System Manager. When opening i I got the following error:

“Exchange detected that “C:windowssystem32mapi32.dll” is not the correct version required to
run Exchange System Manager or Exchange Server 2003. This may cause failures in Exchange System Manager,
affect availability of your server, or both. For more information see Microsoft Knowledge Base article
Q266418 at”

To get around this I renamed the windowssystem32mapi32.dll, took the MAPI32.DLL from the Exchange
server CD-ROM (from the setupi386exchangebin folder) and copied it in to the windowssystem32 folder.

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