OCS Certificate Deployment White Paper
Microsoft has just released a new white paper on using certificates with Office Communications Server. Although entitled "OCS 2007 R2 Deploying Certificates" it actually covers both 2007 and 2007 R2 versions of OCS.
This is a very comprehensive document (just short of 100 pages) that covers everything from basic requirements down to specific scenarios like sample LCSCMD commands for requesting certificates for a reverse proxy. A number of the common problems and misunderstood areas have been addresses in much more detail and the original planning and deployment documents, so we highly recommend reading through this document.
The white paper can be downloaded directly from the link below:
Deploying Certificates in Office Communications Server 2007 and Office Communications Server 2007 R2
http://go.microsoft.com/fwlink/?LinkId=163083