A global outage affecting Microsoft Outlook, Teams and related services began easing Friday after more than a day of disruption across businesses and government organizations worldwide. Microsoft said a broader rollout of software fixes was stabilizing its systems, but the incident highlighted the operational and financial risks created by heavy dependence on centralized cloud-based workplace infrastructure.

Microsoft Begins Stabilizing Services

Microsoft said the outage was caused by server issues affecting features connected to Exchange Online, its cloud-based email and scheduling platform. The company said it was not aware of malicious activity and ruled out artificial intelligence as the cause, while a broader deployment of software fixes was helping stabilize the affected systems.

The outage was among Microsoft’s longest and was the second major disruption to its services this year. Outlook and Teams are used by hundreds of millions of people, making the disruption particularly consequential for organizations dependent on email, calendars, collaboration and virtual meetings.

Global Businesses and Governments Disrupted

The scale of the incident became visible as employees began their workdays across Asia and Europe. Downdetector recorded more than 7.4 million reports worldwide, with complaints reaching nearly 20,000 per minute, more than 1,500 times normal levels.

Government agencies in countries including Australia, Japan and the United States were affected. In the United Kingdom, the Metropolitan Police said the outage affected its ability to report some crimes online, while the NHS said local services were using alternative IT systems and paper records. Financial and corporate operations were also disrupted, including email services at Euronext and backup procedures for earnings communications at Aviva.

The incident reached financial markets directly. Taiwanese financial firms experienced disruptions to fund-management operations, with one company cancelling a bond repurchase transaction and another reportedly using fax to confirm trades. Companies including Workhorse Group and Richemont also experienced disruptions affecting scheduled financial announcements.

Reliability Risks Raise Questions for Cloud Dependence

The outage has renewed questions about the concentration of essential business infrastructure among a small number of technology providers. Microsoft provides not only workplace applications but also cloud infrastructure that supports a broad range of industries and organizations.

Microsoft has experienced other service disruptions, including an earlier Microsoft 365 outage and a separate Azure incident that affected productivity applications and industries worldwide. Analysts have suggested that recurring reliability problems could encourage some IT departments to reconsider further concentration of business operations with a single provider, although the cost and complexity of switching deeply embedded workplace systems can limit those options.

Financial Impact Remains Contained but Material

The disruption could generate insurance claims across multiple industries, although Morningstar DBRS estimated that global insured losses would likely remain between $300 million and $500 million. That would be below the estimated $400 million to $1.5 billion insured financial impact associated with the 2024 CrowdStrike outage, which disrupted more than 8 million Windows-based computers.

Microsoft shares closed flat at $523.88 on Friday and were up roughly 8% for the year. As services recover, the longer-term issue will be whether the incident remains an isolated technical disruption or contributes to broader concerns about the resilience of Microsoft’s cloud and workplace ecosystem. For businesses and investors, service reliability, redundancy and concentration risk are likely to receive greater attention as digital infrastructure becomes increasingly central to global economic activity.