Further speculation: I got one of these messages on LinkedIn and absolutely don't have Ubuntu instances in any of my Azure subscriptions, but I had related keywords to both Ubuntu and Azure publicly in my LinkedIn. It seemed like really sketchy yet sadly ordinary B2B spam. Looking at the dude's LinkedIn profile the "at Ubuntu" didn't mean "Canonical" but some skeevy looking US-based consultancy that seems intent on trampling Canonical's trademarks that should have been sued months ago (or worse has an active license that should be revoked ASAP).