There You set the Port of the icecast server (default 8000)
Then You have to set up a playlist which You name (Important to know), give a genre and desciption (not so important).
Then You have to select some music files from the shares on your EX2.
After that You save the playlist and hit the Play button in the Playlist list.
To test open a player of your choice and open stream URL http://:8000/<NAME-OF-PLAYLIST.m3u
If the EX2 is behind some router and You want access the stream from Internet You have to do portforwarding on the Router. Forward External Port 8000 to internal IP of Your EX2 and Port 8000. How to do that You’ll find in the manual of Your router. Your router should also tell You Your public IP
Of course You then have to change URL in player to http://:8000/<NAME-OF-PLAYLIST.m3u