Can confirm the impact appears total for the Azure portal; Microsoft sells DDoS protection as part of Front Door and other Azure services. Do they not use it themselves?
They got in via a Back Door.
A lot of places sell DDoS protection. Most of it only ever cover the basics. With the size of botnets, hacked computers, etc that are easily and cheaply available for rent - a lot of so called DDoS protection services can't compete.
You really need to dig deep into what they mean by DDoS protection.
What layers are covered? What type of services are covered?
Also e.g. when they mention they cover volumetric attacks, it's often marketing more than the real deal.
E.g. a provider sells $x of total protection (that number means across all PoPs, so usually $x / 30 or less). It can still go down if you focus all your attacks on a few PoPs that matter.
Really important for game servers to have active DDoS protection, like what OVH offers. Not one that kicks in after the attack is detected, otherwise your players get booted, which is the goal of the attacker.
You can't even detect the attack. I've seen 1s that are well disguised or the patterns are so short there's not enough data to tell if it's an attack or real traffic. And yet it's enough to crash your connection or the service itself.