If its so critical why relying on it, and not having ie some mirror or some other way to handle any sort of outage like this. its not like Microsoft is your friend or good business partner, ever.

With every single of these enterprise 'cloud' offerings you are giving (almost) complete power over your business/project to somebody else who couldn't care less about your success or failure, you are simply irrelevant for them. I see it at work too, every time critical external systems go down whole bank stops still, just because few bucks were saved yearly on some on-prem servers.

Look at it this way, you are learning some important lesson today and finding great area of improvement for resiliency from now on.