Remote Connectivity Analyzer was one of Microsoft’s most popular tools for analyzing and troubleshooting Exchange Server and Communications Server. It has been replaced with Microsoft Support and Recovery Assistant for Office 365 which despite the name still has tests for on premise server products. The tool is a web-based application that can perform knowledge-based tests on Exchange Server configuration, Microsoft Lync and Communications server, general tests for Office 365 and Exchange online. In addition, Microsoft Support and Recovery Assistant for Office 365 lets you analyze email header messages to get detailed information on an email and its path over the Internet. It is available here.
See the next section for another Office 365 analysis tool from Microsoft that is focused on Office 365 services.