Same issue happened to me, the here is the link I found actually
worked.
http://www.planetamd64.com/index.php?showtopic=22939

Just locate the file from one of the computer with good Office 2003 and
copy it over.
That's all you have to do to get the Outlook 2003 re-start.


Ivan wrote:
Had the same issues with the MAPI32.dll file. I never installed the desktop
search, which probably saved me. Initially I uninstalled and reinstalled
Office 2007 and got Outlook running again. But the next time I opened Outlook
the same thing happend. So, I uninstalled Office 2007, deleted the MAPI32.dll
files and reinstalled Office 2003 and that worked for me

One question I do have is that when installing Office 2007, it did not
upgrade Office 2003, I still had both suites on my PC. Has anyone else had
this issue?

"Ken" wrote:

Howdy-

Rename the MSMAPI32.dll file to MSMAPI32.xxx and restart outlook (I tried
renaming the mapi32.dll file all day long, and it still would not work).
Renaming MSMAPI32.dll is the only way I could get outlook 2003 to start
again. I made the mistake of uninstalling outlook 2007 because I could not
get the desktop search to install, so I uninstalled 2007 hoping my 2003
outlook would work. Big mistake.



"JimB" wrote:

I appear to have similar problems as others who have attempted to load
Outlook 2007. After apparently successfully (???) loading Office 2007 beta,
I could not start Outlook. I uninstalled 2007, and re-installed 2003 Office
Pro. I received the error message "Cannot start Microsoft Office Outlook.
MAPI32.DLL is corrupt or the wrong version. This could have been caused by
installing other messaging software. Please reinstall Outlook."

I reinstalled outlook with the same results.
I renamed MAPI32.dll as MAPI32.old and ran fixmapi.exe. No luck

Can anyone supply any other suggestions? I am out of luck and I cannot
access my calendar or messages.