Beginning around 4 p.m. EST, developers and other Azure customers began being blocked from accessing files.
"Storage is currently experiencing a worldwide outage impacting HTTPS operations (SSL traffic) due to an expired certificate," according to a message on the Windows Azure Service Dashboard that remained posted Friday night. "HTTP traffic is not impacted. We are validating the recovery options before implementing them. Further updates will be published to keep you apprised of the situation. We apologize for any inconvenience this causes our customers."