The Messaging API is a COM-like API that provides access to the contents of messaging stores. "Extended MAPI in Delphi" is a package providing access to Outlook-compatible objects through a COM-based API. Using MAPI, a program can connect to a MAPI store, and then perform operations against that store.
Example # 1 - Log in MS Exchange Server and Query User Identity
Example # 2 - Retrieve MS Exchange GAL (Global Address List) ...