The Exchange Microsoft Remote Connectivity Analyzer has been an essential tool for Exchange administrators since it’s initial release. ExRCA helps you ensure all is with your Exchange infrastructure, or helps troubleshoot issues related to client connectivity.
If you haven’t seen this tool, you should definitely check it out:
Last week, Microsoft updated this tool to include support for Office 365.
Another interesting fact: Microsoft announced plans to incorporate other products into this tool, beyond Exchange Server. For a complete list of changes in this version, see the release notes.