The letter said that after one Microsoft outreach on July 22, a "Delta employee replied, saying 'all good. Cool will let you know and thank you.' Despite this assessment that things were 'all good,' public reports indicate that Delta canceled more than 1,100 flights on July 22 and more than 500 flights on July 23."
They are not lying though, they fired the guy who was really good with excel years ago and are now too afraid to change the excel file he created containing all bookings ever.
It didn't say "non-windows" it said "served by other providers like IBM". It could easily be Windows servers in IBM's cloud and wouldn't ya' know...IBM uses Crowdstrike.
i'm gonna level with you, i completely forgot IBM cloud was a thing and just thought this was MS pointing fingers at system Z or system . thanks for catching that!
Having to reset or recalibrate other old systems that were disrupted by newer ones going offline makes sense to me. If servers were providing Network Time Protocol and older clients drifted without it, that could cause them to be unable to rejoin a domain. I'm speculating wildly, but it's an example of how losing important infra can cause issues even after it's restored.