One of our consultants in the UK, Paul Brombley did a write up on a deployment and how they dealt with Reverse Number Lookup for a legacy PBX. He also presented to the team of consultants assisting with customer and partner deployments of R2. http://blogs.technet.com/msukucc/archive/2009/05/21/reverse-number-lookup-and-dealing-with-legacy-pbx.aspx

OCS Team