If I migrate the files from Office Mix to Stream now, will all of my interactive features will be lost?
Will I then have to recreate them eventually in PowerPoint once it is updated?
We are moving your original powerpoint from Office Mix to Stream as part of the move. So the interactive features are still in the powerpoint file itself I believe.
However I don't believe we know enough yet on how we'll exactly do interactive things in Stream in the future to know if everything from Office Mix is fully persevered, etc.