MS Azure and 365 Service Outages Report Tens of Thousands of Cases at Peak

Disruptions in Microsoft's (MS) cloud service 'Azure' and its office suite '365' have caused confusion among customers worldwide.

According to Downdetector, a U.S.-based online service monitoring site, as of 1:36 p.m. Eastern Time on the 29th (local time), 3,096 cases of Azure service disruptions and 3,448 cases of 365 service disruptions were reported, respectively.

Microsoft. Reuters Yonhap News

At one point during the day, Azure saw up to 20,000 cases and 365 saw up to 10,000 cases of access disruptions, but the situation eased as recovery efforts progressed.

The service disruptions at MS began to stand out after 11 a.m. that day.

According to The Wall Street Journal (WSJ), Reuters, and other outlets, this led to the suspension of websites and online check-in systems for airlines such as Alaska Airlines and Hawaiian Airlines. In the United Kingdom, Vodafone and Heathrow Airport also experienced disruptions in major systems, including their websites.

Azure announced that "an unintended configuration change in our infrastructure is suspected to be the cause of the issue," and explained, "We are currently blocking all changes to the Azure Front Door (AFD) service while simultaneously rolling back to the last known healthy state." The company also identified that the 365 service was experiencing secondary effects related to the issue originating in Azure.

Following last week's large-scale outage at Amazon Web Services (AWS), the occurrence of service disruptions at MS is raising concerns about the reliability of online services, U.S. media outlets pointed out.

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