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Microsoft Outlook outage disrupts business email for Americas users

wired.com [$] — November 12, 2026 at 09:01 PM UTC

Microsoft is investigating a major outage affecting Outlook and other Microsoft 365 services for business and enterprise customers in the Americas, with the company reporting "elevated loads" and server failures. The disruption began around 10:40 am ET on Thursday, November 12, 2026. Microsoft confirmed issues accessing Exchange Online mailboxes and Teams functionality, attributing the problem to servers failing automated health checks rather than increased traffic. The company has paused deployments, restarted affected servers, and redistributed connection traffic globally to reduce impact. Impacted services include Exchange Online, Teams, SharePoint Online, Copilot 365, and Defender XDR. Downdetector showed a spike in user reports around noon, with reports declining by 1:15 pm ET. No cyberattack is suspected. Major Microsoft outages are rare but not unprecedented, such as the July 2024 Crowdstrike incident that caused widespread disruptions. The outage's end time and root cause remain unclear.

With a significance score of 1.4, this news ranks in the top 39% of today's 32330 analyzed articles.

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[2.4]

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[2.4]

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[2.4]

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[2.3]

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[2.3]

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[2.3]

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[2.3]

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[2.3]

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[2.3]

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[2.3]

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[2.3]

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[2.2]

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[2.1]

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[2.1]

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[2.1]

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[2.1]

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[2.1]

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[2.1]

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[2.1]

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[2.1]

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[2.1]

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[2.0]

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[2.0]

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<1h

[2.0]

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[2.0]

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[2.0]

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<1h

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[2.0]

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[2.0]

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[2.0]

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[2.0]

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<1h

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[2.0]

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[2.0]

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[2.0]

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[2.0]

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[2.0]

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[2.0]

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[2.0]

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[2.0]

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[1.9]

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[1.9]

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[1.9]

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[1.9]

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[1.9]

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[1.9]

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[1.9]

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[1.8]

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[1.8]

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[1.8]

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[1.8]

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[1.8]

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[1.8]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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[1.7]

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<1h

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[1.7]

Singapore government systems hit by Microsoft outage, emergency services unaffected (channelnewsasia.com)

<1h

[1.6]

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[1.6]

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[1.6]

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[1.6]

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[1.6]

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[1.6]

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[1.6]

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[1.6]

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<1h

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[1.6]

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[1.6]

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[1.6]

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[1.6]

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[1.6]

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[1.5]

Microsoft outage disrupts Outlook for thousands globally (thehindu.com)

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[1.5]

Microsoft Outlook outage persists globally after disrupting email access (gmx.net)

<1h

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[1.5]

Microsoft email outage hits 130,000 users; Outlook still down after server overload (bhaskar.com)

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[1.5]

Microsoft confirms Outlook outage affecting Brazil and global users (folhavitoria.com.br)

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[1.5]

Microsoft outage disrupts Microsoft 365, Outlook, and Teams for users in Romania and beyond (adevarul.ro)

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[1.5]

Microsoft outage disrupts Outlook for US office workers (cnn.com)

5h

[1.5]

Microsoft investigates Outlook and Teams outages affecting 100,000 users (yle.fi)

7h

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[1.5]

Microsoft 365 outage disrupts email for N.L. government and St. John's (cbc.ca)

8h

[1.5]

Microsoft outage disrupts Outlook, Teams, and Copilot for thousands of users (fr.euronews.com)

9h

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[1.5]

Microsoft 365 outage disrupts Outlook, Teams, and Copilot for users in India and the US (news18.com)

10h

[1.5]

Microsoft outage disrupts Outlook, Teams, and Microsoft 365 for thousands (reviewjournal.com)

10h

[1.5]

Microsoft confirms Outlook outage affecting users globally (expansion.com)

10h

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[1.5]

Microsoft Outlook outage disrupts email for over 100,000 users worldwide (rnz.co.nz)

11h

[1.5]

Microsoft 365 outage hits Outlook and Teams worldwide (www1.folha.uol.com.br)

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[1.5]

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[1.5]

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[1.5]

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[1.5]

Microsoft outage disrupts Outlook, Teams, and Copilot for global users (lefigaro.fr)

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[1.5]

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[1.4]

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[1.4]

Microsoft Exchange outage disrupts Outlook and Microsoft 365 for over 100,000 users (mashable.com)

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[1.4]

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[1.4]

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[1.4]

Microsoft outage disrupts Outlook for over 120,000 users in the Americas (toronto.citynews.ca)

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[1.4]

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[1.4]

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[1.4]

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[1.4]

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[1.4]

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[1.4]

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[1.3]

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[1.3]

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[1.3]

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[1.3]

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[1.3]

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[1.3]

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[1.3]

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[1.3]

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[1.3]

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[1.2]

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[1.2]

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[1.2]

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[1.2]

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[1.2]

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[1.0]

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[1.0]

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