Outlook Email Outage Disrupts Users Across Americas
Thousands of users reported problems accessing Microsoft Outlook email and calendars on Thursday afternoon, with Microsoft investigating the disruption.
Updated on Nov. 12, 2026 in Remote Work
Thousands of users across the Americas reported being unable to access Microsoft Outlook email on Thursday, with reports beginning around noon EST. Microsoft is investigating problems affecting access to Exchange Online mailboxes and has not provided an estimated time for restoration.
Why it matters
Outlook provides email and calendar access through web, computers, and mobile devices as part of Microsoft 365, so the disruption affects routine communication for many workers. The outage also disrupted scheduling and messaging in Microsoft Teams, compounding the impact for remote and hybrid teams that rely on both platforms.
Downdetector recorded nearly 12,000 outage reports by 1:30 p.m. EST on Thursday, a count drawn from user self-reporting rather than Microsoft's internal service telemetry. Microsoft has not said how many accounts were affected or when Exchange Online mailbox access will be fully restored.
The players
Microsoft
Microsoft is a global technology company that develops the Microsoft 365 suite, including Outlook, Teams and Exchange Online.
Downdetector
Downdetector is a website that aggregates user-submitted reports to track possible outages of online services and applications.
The details
Users experienced issues accessing Exchange Online mailboxes through multiple connection methods in the Americas, including web, desktop and mobile access to Outlook. Microsoft said it is investigating the problem and has not yet identified a timeline for resolving it.
Timeline
Thursday, around noon EST: Outage reports first began appearing on Downdetector.
Thursday, 1:30 p.m. EST: Nearly 12,000 outage reports had been submitted to Downdetector.
Remote Work
The outage hit Exchange Online, the cloud-hosted mailbox service that underpins Microsoft 365, so workers who depend on centrally hosted email and calendars for remote coordination lost access at the same time. It illustrates how concentrated reliance on a single vendor's cloud platform can interrupt distributed teams that do not share an office.
Workers who rely on Outlook for email and calendars may be unable to send messages or check schedules until access is restored. Those using Teams for scheduling and messaging may need to coordinate with colleagues through alternative channels during the disruption.
The takeaway
Remote teams should keep an alternate channel for urgent coordination, such as a phone number or secondary messaging app, so work can continue when a core email or collaboration platform goes down.
Further reading
For more on how cloud email outages affect distributed teams, see Remote Work.
