Embed content from Sharepoint with "Web Content"

When you try to embed an image or PDF document stored on Sharepoint with the “Web Content” tool, you may face a problem: nothing is displayed and the item remains gray.

To make it work, you need to open it from Sharepoint and click at the top left of the window on the “...” then click on “</> Embed” and retrieve this link.
Once pasted into Web Content on your iObeya board, it will work.

This is rather counter-intuitive as you should NOT use the “Share” button on the top right.