Outlook outage affects thousands; authentication issue noted

Tech

Outlook outage affects thousands; authentication issue noted

26 sourcesUpdated Aug 31, 2026

Microsoft confirmed a widespread Outlook/Exchange Online outage affecting thousands of users. The company said the disruption stemmed from an authentication component issue and is testing a remediation strategy before a broader rollout. The spike in problems began around 11 a.m. ET and persisted for several hours across multiple Exchange Online features such as mail delivery, search, and login. Reports also indicated partial outages of OpenAI’s ChatGPT Work services during the same window, complicating workflows for users relying on integrated tools. Coverage from multiple outlets highlighted the outage’s impact on business communications and the ongoing diagnostic and restoration efforts. Officials cautioned that status updates and regional impact could evolve as teams work to restore full service.

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Last updatedAug 31, 2026

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Left· 4 sources

“Microsoft 365, Outlook and ChatGPT users report outages Monday. What we know”

Houston Chronicle · Aug 31, 2026

Center· 1 source

“Microsoft Outlook down across the country - what we know so far”

Falmouth Packet · Aug 31, 2026

Right· 1 source

“Stay updated: Microsoft Outlook, OpenAI outage reported by thousands”

KATU2 - Portland News · Aug 31, 2026

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