Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Following are links to additional Office Communications developer resources on Microsoft Developer Network (MSDN).
Server and Client Software Provides links to download sites for various software including servers, clients, best practices analyzers, resource kit tools, controls, and language packs.
SDK Downloads Provides links to download sites for all of the Office and Unified Communications SDKs.
Sample Downloads Provides links to download sites for sample applications that demonstrate the use of Office and Unified Communications APIs.