New Remote Connectivity Analyzer
A couple of days ago, Microsoft announced the new Remote Connectivity Analyzer. You can now test Exchange and Lync using the same web page.

We are excited to announce the new Microsoft Remote Connectivity Analyzer. This tool is the result of a combined effort by the teams that created the Lync Remote Connectivity Analyzer and the Exchange Remote Connectivity Analyzer.
We’ve eliminated OCS and Lync from the name and have a new way to access the website: http://testconnectivity.microsoft.com. The new tool has all the same great tests for Lync and Exchange available on one website. The previous website redirects to this new site.
Author: Premal Gandhi, Microsoft Senior Supportability PM – LyncTM
Editor: Susan S. Bradley
Publication date: January 15, 2013
Product version: Lync Server 2010, Exchange Server 2010