1. Open Internet Explorer. In the Address bar, type https://published_server_name/Microsoft-Server-Activesync, where published_server_name is the published name of your OWA server (the name your end users will type).
2. Type the user name and information that you want to authenticate.
3. If you receive an Error 501/505 “Not implemented” or “Not supported” error message, Exchange ActiveSync is working properly.