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in Brief It was a tsunami of DNS queries that ultimately took out a host of Microsoft services, from Xbox Live to Teams, for some netizens about an hour on April Fools Day, Redmond has said.
Or as the Windows giant put it, the outage was the result of an anomalous surge in DNS queries from across the globe targeting a set of domains hosted on Azure. In a postmortem examination of the downtime, Microsoft said the flood of requests triggered a programming flaw in its infrastructure that hampered its ability to cope with the demand: