From Business Insider · Thibault Spirlet · · 2m
Microsoft 365 outage enters second day
Microsoft's Outlook outage has dragged into a second day, disrupting email, Teams, and other services for businesses worldwide.
In brief
Microsoft's Outlook outage has dragged into a second day, disrupting email, Teams, and other services for businesses worldwide. Microsoft 365 services including Outlook and Teams suffered a major outage lasting over twenty-one hours, affecting businesses globally and potentially becoming the company's longest outage…
Outlook outage enters second day
Microsoft's global Outlook outage has dragged into a second day, leaving some users unable to access email and disrupting Teams, Copilot, and other Microsoft 365 tools.
AI tools also affected
Anthropic and OpenAI said their connectors to Microsoft 365 tools had been disrupted. Anthropic reported some recovery at nine thirty-six a.m. ET on Friday but services remained degraded.
Microsoft reports sustained improvements
Microsoft said in a ten a.m. ET update it was seeing sustained improvements as affected services gradually recovered. Some users may still have trouble connecting or experience email delays.
What caused the outage
Microsoft first flagged the outage Thursday around midday ET. The company said some infrastructure was under elevated load across multiple regions because servers unexpectedly became unavailable.
Scale of disruption
Downdetector recorded more than one hundred thirty thousand reports of Outlook problems in the US at the outage's peak on Thursday. The disruption affected Outlook, Teams, SharePoint, Copilot, and other Microsoft 365 products.
Real-world impact on businesses
The US House of Representatives said the outage affected its users.Workhorse Group postponed its quarterly earnings call.Air India and IndiGo rerouted email services.Government agencies in Singapore, the Philippines, and Japan reported knock-on effects.
Potentially longest outage ever
The outage lasted around twenty-one hours as of nine a.m. ET, longer than a major Microsoft 365 disruption in June two thousand twenty-two, which took sixteen hours and twenty-seven minutes to recover from.
No timeline for full recovery
Microsoft said it was reviewing what happened and how to prevent similar problems in the future. The company has not provided a timeline for when all services will be fully restored.
The headline
Microsoft 365 services including Outlook and Teams suffered a major outage lasting over twenty-one hours, affecting businesses globally and potentially becoming the company's longest outage ever.
