Microsoft restores services following massive global outage impacting Outlook and Teams
Microsoft has begun restoring global services after a massive infrastructure failure knocked out Outlook, Teams, and other tools across dozens of countries.
Microsoft has begun restoring global services following a massive infrastructure failure that knocked out Outlook, Teams, and Copilot across dozens of countries, disrupting millions of users and key public services.
The disruption began on Thursday in the Americas and spread globally within an hour. Outage reports reached 74 countries and territories in that time, according to Downdetector, which recorded a tenfold jump in UK reports at 17:43 UTC, followed by surges in India and New Zealand as their workdays began.
Media additions
At the peak of the incident, outage-tracking platform Downdetector recorded nearly 130,000 problem reports for Outlook alone, according to Forbes Australia. Additional surges hit Word, Excel, PowerPoint, OneDrive, SharePoint, and Defender XDR, alongside AI connectors used by OpenAI and Anthropic, noted The Guardian.
Microsoft repeatedly confirmed that the incident was not the result of a cyberattack or malicious activity. Charles Lamanna, the company’s executive vice president for Copilot, Agents and Platform, posted on X to confirm there was no indication of cyber activity, according to Thenextweb.
Instead, the company attributed the crash to a cluster of overloaded servers failing automated health checks during updates and load balancing, reported Fox5ny. Mark Gregory, an associate professor in the School of Engineering at RMIT University, told The Guardian that the issue appeared to affect the network layer, forcing customers to share a smaller pool of surviving servers and creating a cascading overload.
Australia’s home affairs minister, Tony Burke, noted that officials believed the situation bore similarities to the 2024 CrowdStrike update failure, according to Thenextweb, though Microsoft did not officially confirm that diagnosis.
The technical failure rippled far past standard corporate desks. British police forces urged citizens to phone in crimes rather than report them online, while National Rail warned passengers that emailed tickets might be inaccessible, as reported by The Guardian.
Government ministries in Japan reverted to paper-based processes, according to Thenextweb, and US city governments including Miami Beach and Austin instructed residents to use telephone services, as noted by the same outlet. Financial markets also felt the pinch, and major airlines such as Air India, IndiGo, and Akasa Air had to reroute email support channels, according to Thenextweb and CNBC. Earnings announcements for companies including Richemont and Workhorse Group were postponed or slightly delayed, as reported by CNBC and The Guardian.
| Service / Metric | Reported Peak Figures | Status / Notes |
|---|---|---|
| Microsoft Outlook (Downdetector) | ~130,000 to 138,058 reports | Peaked Thursday afternoon; queues approaching normal levels by Friday, according to Fox5ny and Thehindubusinessline. |
| Microsoft 365 Overall | ~13,000 complaints | Progress reported across North America, Europe, and Asia-Pacific, per Thehindubusinessline. |
| Microsoft Teams | 763 to thousands of reports | Gradually restored alongside mailbox access, according to Thehindubusinessline and CBC. |
| Geographic Reach | At least 74 countries | Global impact across Americas, Europe, Asia-Pacific, as reported by Thehindubusinessline and Thenextweb. |
As engineers worked through multiple failed mitigation attempts—including restarts and traffic rerouting that initially produced only marginal success, according to Thenextweb and The Guardian—Microsoft validated an alternative service health-check method, noted CNBC. By Friday morning, the company reported that email queues were approaching normal levels and recovery actions were complete across portions of the affected infrastructure, according to Fox5ny and CNBC.
To protect backlog messages from bouncing during the disruption, Microsoft extended its email timeout window to 48 hours, reported Fox5ny. Financial institutions like Standard Chartered and ING Australia also issued warnings regarding scammers impersonating technical support staff, according to Thenextweb.
What to Watch Next
- International enterprise and government bodies face renewed scrutiny regarding cloud infrastructure reliance and redundancy planning, according to Thenextweb.
