Microsoft links recent Microsoft 365 outage to buggy update

​Microsoft says a coding issue is behind a now-resolved Microsoft 365 outage over the weekend that affected Outlook and Exchange Online authentication. According to an incident report published in the Microsoft 365 admin center on Saturday at 09:29 PM UTC, the incident also triggered Teams and Power Platform degraded functionality and caused Purview access issues and errors. These issues were addressed by reverting the buggy code change tagged as the preliminary root cause of the widespread outage that started at 8:40 PM UTC and ended around 9:45 PM UTC. "A recent update to Microsoft 365 authentication systems contained a code issue, resulting in impact to some Microsoft 365 apps and services," the company said on Saturday after resolving the authentication and access problems. "Following our reversion of the problematic code change, we've monitored service telemetry and worked with previously impacted customers to confirm that service is restored." Redmond says a preliminary post ... Read full article.