Microsoft Exchange 5.5
Messaging and Collaboration for Demanding Business Needs
Introduction to Collaboration Data Objects
Microsoft Corporation recognizes that developers need an object library providing greater functionality than what was available in the Active Messaging 1.1 library, which shipped with Microsoft® Exchange 5.0. Developers need objects that support capabilities beyond simple messaging and into the areas of calendaring, collaboration, and workflow. Such capabilities can simplify the development of heavy-duty resource-scheduling applications requiring information to be displayed through a calendar.
In response, Microsoft has replaced its Active Messaging objects with Collaboration Data Objects (CDOs). These CDOs are available in a library known as CDO 1.2, which replaces the Active Messaging object library version 1.1 and ships with Exchange 5.5. One of the library’s key features is that applications created with Active Messaging 1.1 can run unchanged in a CDO 1.2 environment. Also available, for developers working in the Internet Information Server 4.0 environment, is a subset library of CDO 1.2 known as Collaboration Data Objects for Microsoft Windows NT® Server.