This session covers how to use Network Monitor to troubleshoot SIP and trace Office Communications Server 2007 R2 traffic. This session covers troubleshooting steps that can be used to identify points of failure and to answer the most common questions, including: How do I tell if my certificates are working correctly? How can I tell if DNS is configured properly? What should I do to make sure voice traffic quality is maintained? Why won't my communicator client connect to Office Communications Server 2007 R2?