Test Exchange Active Sync and much more

Found this cool site. It allows you to test the following type of connections to your exchange server and see if they are configured properly.

Microsoft Exchange ActiveSync Connectivity Tests Exchange ActiveSync ActiveSync AutoDiscover

Microsoft Exchange Web Services Connectivity Tests Synchronization, Notification, Availability, and OOF Service Account Access (Developers)

Microsoft Office Outlook Connectivity Tests Outlook Anywhere (RPC over HTTP) Outlook AutoDiscover

Internet Email Tests Inbound SMTP Email Outbound SMTP Email

https://www.testexchangeconnectivity.com/