Deploying Office Live Communications Server 2005 at Microsoft

Detailed overview of how Microsoft IT deployed and manages Microsoft Office Live Communications Server 2005 to provide its employees with a real-time communications and instant messaging solution. The Microsoft installation of Live Communications Server 2005 is redundant, scalable, highly available, capable of operating across multiple forests, and provides encrypted communication with contacts outside corporate firewall.

[Via Microsoft Download Center]

Word document and ppt if you follow the link.