Edge Animate is for 'modern' browsers but there are some fallbacks you can employ.
From the File > Publish Settings menu option, tick and select the first option Web, and enable Use Google Chrome Frame for IE, 6,7,8.
Alos, you can set up a poster image which will give a static view of your composition.
First lets seek to a position in the animation that you want as your poster. Move the play head to 0:02.250 (forexample). We will use this position as the poster image.
Make sure that you have “Stage” selected in the Elements panel. Now click the camera icon in the Properties panel and click "Capture" to capture the poster image. A "Poster.png" appears in the Assets panel.
Thank you very much