Microsoft IT has published a white paper about their rollout of Exchange Server 2007 Unified Messaging (UM). This is a good resource for those who enjoy technical detail and are curious about real-world UM implementations!

Using Exchange Server 2007 for Unified Messaging and Fax

What is the best way to implement the Unified Messaging (UM) features of Microsoft Exchange Server 2007? Discover how Microsoft IT uses Unified Messaging to integrate voice messagi