Global outage: Microsoft blames network upgrade

A recent global Microsoft outage, which impacted businesses and workers across South Africa, has shed light on the heavy reliance of modern organizations on a limited number of major technology providers. While Outlook was the most visible service affected, the disruption extended to other Microsoft 365 components, including email, calendars, Teams, and the Copilot AI assistant.

South African tech analyst Arthur Goldstuck noted that companies have become overly dependent on a single provider, leaving them vulnerable when infrastructure failures occur. The South African Revenue Service, the City of Cape Town, and the Central University of Technology all experienced issues with Microsoft-based services during the disruption, which began on Thursday, November 12, and continued into Friday.

Goldstuck explained that Exchange Online, the backbone of Microsoft's cloud-based email and calendar services, was primarily responsible for the outage, causing cascading failures across Microsoft's server infrastructure. He suggested that a network configuration problem may have triggered a chain reaction, overwhelming servers and causing them to become unresponsive again after being restored.

Microsoft attributed the disruption to elevated demand on its infrastructure and a recent network configuration change, while also examining a server availability issue and a recent security update. The company is working to restore full service availability and will continue investigating until the issue is fully resolved. Goldstuck highlighted the timing of the outage, which followed Microsoft's strong financial performance and a workforce reduction program, raising questions about the potential impact of cost-cutting measures on the company's technology infrastructure.