Interesting "feature": the user perceives a (real) benefit: preview. But, there is also an unspoken benefit for Microsoft, who can feed their marketing analytics, or AI training data, or ... with what it learns via the chats and links.

I'd be fine if the fine print in the EULA provides a guarantee that the feature scans content solely for generating previews, and that M$ keeps no copy of it, etc....But, I'm sure I'd go blind looking for such text in the EULA.