I installed the Exchange 2003 admin tools on my machine and messed up my mapi32. I finally got my PC back to normal, running Office communicatior, Outlook 2007 and being able to send mail from within an Office document. I had to uninstall the exchange tools to get my other stuff working, but I need the admin tools back. I aready have the adminpak.msi working. My question is: what exactly do I need to do (and in what order) to install the exchange 2003 tools to avoid the mapi32.dll issue happening again. I know they can all play nice, I had it working before my hard drive crashed and I had to rebuild the whole box. I have the MSmapi32.dll version 12.0.4518.1014 in C:\Program Files\Common Files\System\MSMAPI\1033, and in c:\windows\system32, and I have the same version, but named mapi32.dll in C:\Program Files\Microsoft Office\Office12.