Microsoft Exchange Remote Connectivity Analyzer

 

https://www.testexchangeconnectivity.com/ is a owned site which allows the testing of the following:

Microsoft Test
Microsoft AutoDiscover Test
Office 2007 AutoDiscover Connectivity Test
Office /HTTP Connectivity Test
Inbound SMTP Email Test

Note that not everything is working yet, I’ve had a few issues when testing the site, however it’s definitely worth keeping an eye on. Thanks Microsoft!