This video shows off the new Exchange Server Remote Connectivity Analyzer. The Exchange Server Remote Connectivity Analyzer is a web site for IT Administrators to validate and diagnose end-to-end Exchange scenarios. The site simulates multiple Exchange client access and inbound service related scenarios and reports whether the test was successful. If the test fails, we tell the IT Admin exactly where in the process it failed as well as provide troubleshooting tips on resolving the issue.
Watch it at the source: http://edge.technet.com/Media/The-Remote-Connectivity-Analyzer-for-Exchange-Server/