I need to modify a few C applications that are about 10 years old and are currently using CMC to send and receive email from Exchange. I tried using Simple MAPI but am encountering the Outlook security prompts, so I am now looking at using Extended MAPI. I have found examples here using C++, but nothing written in C. Microsoft does not seem to offer much in the way of examples and rewriting the applications in C++ is not an option because there are several custom libraries that would also need to be converted. One of the applications is loaded on about 15,000 workstations, so a third party product or a loading a custom dll is not an option either. The only functionality I need is to be able to logon, logoff, send email and read email (in plain text). Any ideas ??