[MSDN Library June 1998] Messaging (47.4206349206349%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Programming Guidelines > BackOffice Programmer's Reference > Developing Microsoft Exchange Server Applications > The Architecture of Microsoft Exchange Server > Microsoft Exchange Server Components
[MSDN Library June 1998] Messaging Application Program Interface (MAPI) (21.5232487922705%)
MSDN Library Visual Studio 6.0 > Windows Resource Kits > Windows NT 3.51 Resource Kit > Windows NT Resource Kit Volume 1: Resource Guide > Microsoft Mail > Customizing the Mail Client
[MSDN Library June 1998] Messaging Clients in a BackOffice Environment (19.1117052881759%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Programming Guidelines > BackOffice Programmer's Reference > Developing Applications in the Microsoft BackOffice Environment > Programming Requirements and Recommendations > Client Requirements for BackOffice