This article describes how to correctly configure the Microsoft Office Communications Server Edge Server role on the Microsoft Windows Server 2008 platform when three or more network interfaces are used. In a basic Edge Server deployment, only two network interfaces are used (one is internal-facing and the other is external-facing). But when multiple interfaces are dedicated for external-facing communications, changes in the networking behavior of Windows Server 2008 R2 and Windows Server 2008 can limit proper traffic routing, preventing Web and A/V Conferencing features from working for external Microsoft Office Communicator clients.
Due to recent discoveries in the July 2010 Cumulative Update for Office Communications Server 2007 R2, it is necessary to remove this update from the download site until it can be patched. The primary concern is an issue with the Response Group Service. When the cumulative update is applied, changes in agents and agent groups are not applied until after the Response Group Service is restarted. This, of course, is not acceptable in the quality of our products.