Microsoft Office Communications Server 2007 provides a standards-based platform, with extensible SDKs, that allow developers the ability to presence-enable existing applications, and also create next-generation applications with real-time presence and speech capabilities. Microsoft Office Communicator 2007 is Microsoft's unified client enabling information workers to communicate in real-time using a wide range of modalities such as VOIP calls, audio/video/web conferencing sessions and instant messaging. Office Communicator 2007 and Office Communications Server 2007 integrate with a wide range of Microsoft Office applications and existing enterprise telephony infrastructure.

Please note: SQL Server 2005 is required when using Office Communications Server 2007 Enterprise Edition.