I was onsite the other day in need of testing an ActiveSync connection at which point I remembered about this great tool:

https://www.testexchangeconnectivity.com

It can be used to test ActiveSync, Exchange Web Services (EWS), Outlook Connectivity (Anywhere and Autodiscover) and basic email sending/ receiving.

A really useful tool which saves time faffing about having to locate spare phones and what-not.

NeilC