Microsoft Lumia XXX with Windows.
It wouldn't surprise me. Microsoft, like myself, should never be allowed to name things EVER.
That being said, as long as the phones are decent, I don't care whose name is on them. But Microsoft isn't a name that most people will want on their expensive shiny shiny. If I were them, I'd just use Lumia and not put the word "Microsoft" anywhere on any of their devices, their sales will thank them for it...