PowerPoint & Offiice Mix & Audio

Hello,

I am trying to use Background-Music with Quiz-Slides on PPTx.

In Presenter-Mode everything is fine. But after publishing the PPTx to Office-Mix the Audio is stripped out or blocked.

Also Background-Music ( Play in Background and Play across Slides ) is not working.

Or do I do something wrong?

If somebody had an working example I would be glad to receive and see it.

With best regards,

Stefan Schwarz