Microsoft blamed Delta Air Lines on Tuesday for its dayslong struggle to recover from a global cyber outage that led it to cancel more than 6,000 flights.The flight disruptions stranded hundreds of thousands of travelers and are estimated to cost the Atlanta-based airline $500 million.Last week, Delta’s CEO Ed Bastian told CNBC that while the airline heavily relies on Microsoft and CrowdStrike, both tech companies had failed to deliver an “exceptional service.” The  global cyber outage caused Delta to cance ...