Edge Servers Drilldown
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.
For details about Edge Servers, see the Microsoft Office Communications Server 2007 R2 the Edge Server Deployment Guidelines in the Planning and Architecture documentation.