Users enabled for Enterprise Voice and UM can experience the full measure of Microsoft’s UC solution by integrating Office Communications Server and Exchange UM Server. Users can retrieve voice mails and view call logs as well as missed calls directly from Outlook 2007 in the same way they read their e-mails. This gives information workers an integrated and powerful experience.

To integrate the two systems requires deploying the server role Exchange UM, which is available in Exchange Server 2007 SP1. This server role serves as the voice mail solution for Office Communications Server, and Office Communications Server serves as an IP voice gateway to Exchange UM Server. Office Communications Server must also be configured for Enterprise Voice (VoIP). This integration is currently not seamless and requires a number of manual steps, which are detailed in this chapter.