Office Communications Server 2007: Learn how to take advantage of the enhanced e-learning collection on enterprise capabilities provided by Office Communications Server 2007, and get a richer experience using virtual labs designed for the final product version.
http://go.microsoft.com/?linkid=7667746
While on the subject, you might also like free downloadable sample chapters from the Microsoft Office Communications Server 2007 Resource Kit:
http://go.microsoft.com/?linkid=7675616
Enjoy!
- Nino Bilic