Sounds like anyone dealing with any sort of vaguely sensitive information through email, and certainly any corporation, should avoid using Outlook for anything.

The article is about email verification links, which is a pretty clear case where this can be dangerous, but tons of other links can get emailed without being intended for a wider audience.

Besides, the fact that Outlook shares anything related to the content of your email with the outside world is just completely unacceptable.

(Should private links be sent over unencrypted email? Probably not. But lots of stuff gets emailed that's not super secret and yet also not meant to be shared outside the company.)