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Collaboration Data Objects
open-in-new
<p>Collaboration Data Objects (CDO), previously known as OLE Messaging or Active Messaging, is an <a href="/facts/Application_programming_interface/GMlN4vUr">application programming interface</a> (API) included with <a href="/facts/Microsoft_Windows/bwhAhuSL">Microsoft Windows</a> and <a href="/facts/Microsoft_Exchange_Server/9pu8G4It">Microsoft Exchange Server</a> products. The library allows developers to access the Global Address List and other server objects, in addition to the contents of mailboxes and public folders. </p>