Microsoft Office Apps
Office.com: Author an Excel, PowerPoint, OneNote, or Sway in your web browser and then get embed code. When you make updates, the embedded version will automatically be updated on your site! PowerPoint online is great for newsletters and photo slideshows—simply make the newest addition the first slide so that's what visitors see on your page.
Sway.com: Each project made in Microsoft Sway has embed code. Get the code by clicking the Share icon