I’ll always watch a presentation from a purple-haired cyberpunk over some bizbro with an array of asshole-shaped logos behind him.
(Actually, her presentation about using Qt in a car UI went way over my head, so I only watched a few minutes of it. But I’m watching exactly zero minutes of anything Nadella says nowadays.)
I think they mean https://www.collaboraonline.com/. That’s what’s used if you install the office addon for Nextcloud, if I’m not mistaken.