I had a customer that uses Word 2007. They were having a problem when they clicked Send and “Send as PDF” and was getting this error “mapi32.dll is an invalid Extended MAPI Library” and “Mail is not installed”. I could not figure it out.
Finally I got to another computer in the office and compared the mapi32.dll files. They both had Office 2007. They were quite different in size so I renamed the mapi32.dll on the machine throwing the error and copied over the mapi32.dll from the second computer and after that it worked fine.
Before I copied the mapi32.dll I also installed “2007 Microsoft Office Add-in: Microsoft Save as PDF or XPS” but I do not think I really needed to do that.
