OCS 2007 R1/R2 Remote Access Configuration Guide
I have referred this post for the edge server configuration as well as for the DNS,certificates and MOC client setup.
Very helpful post with the PDF download of the configuration guide :)
http://blogs.technet.com/rickva/archive/2009/04/09/ocs-2007-r1-r2-remote-access-configuration-guide.aspx