I read that the DNS routing records were gone. Since that would also stop email and IOT devices as well, it corroborates the reports that employees can't access emails, IP phones, badge readers don't work so they can't access buildings and conference rooms, etc.
They made everything too cool for school and it's backfiring spectacularly.
I guess I should say that what I meant is that it doesn't need to be any more than DNS routing problems. The code will be backed up all over the place on redundant systems, but if the DNS routing is gone then those won't fail over.