Microsoft’s Outlook outage continued into Friday, disrupting workplace email worldwide as engineers repaired servers; the company had not confirmed full recovery in its latest update.
The disruption began on Thursday, 12 November, and continued into Friday morning in Asia. Users reported inboxes failing to load and problems sending or receiving messages. For organisations relying on Microsoft 365, the interruption also affected other work services and some government operations.
What Caused the Microsoft Outlook Outage?
Microsoft’s incident updates describe servers becoming unavailable and difficulties restoring the infrastructure that handles mailbox connections. An earlier investigation identified an overwhelmed process responsible for establishing secure connections.
Later updates described routing problems and increased internal calls to backend servers during recovery efforts. Engineers were still investigating the underlying cause of that traffic.
These findings describe the failure and recovery problems, rather than a completed explanation of the original trigger. Microsoft said its post-incident report would provide the full root cause after mitigation. Its updates are reproduced in the University of Pennsylvania’s Microsoft incident feed.
How Many Users Were Affected?
There is no verified worldwide total in the updates reviewed. Downdetector figures measure submitted problem reports, so they do not establish how many individual people lost access.
DW reported nearly 130,000 US Outlook reports shortly after 1 p.m. EST on Thursday, equivalent to 11:30 p.m. IST.
India’s reporting pattern showed disruption continuing into the working day. Moneycontrol reported a peak of 2,157 complaints at 11:42 p.m. IST on 12 November. Reports fell overnight, then reached 1,960 at 8:42 a.m. IST on Friday.
A falling complaint count alone does not confirm that every affected mailbox has recovered.
Which Countries and Services Were Impacted?
Downdetector received reports from 74 countries and territories within about an hour, DW reported. Countries identified in Moneycontrol’s coverage included India, the United States, the United Kingdom, Japan, Singapore and Australia.
The reported service impact extended beyond the Outlook application:
| Service | Reported Disruption |
| Outlook and Exchange Online | Mailbox access, sign-in, and sending or receiving email |
| Microsoft Teams | Connectivity and features dependent on Exchange Online |
| SharePoint Online | Included in Microsoft’s affected-services listing |
| Microsoft 365 Copilot | Included in the wider service disruption |
| Microsoft Defender XDR | Listed among potentially affected services |
Microsoft subsequently narrowed the impact to features relying on Exchange Online and email, while messaging and online meetings were largely working, Moneycontrol reported. The list should not be read as confirmation that every feature failed for every customer.
What Has Microsoft Said About Recovery?
Some servers returned to service, but earlier updates warned that restored machines could stop responding when traffic resumed.
At 11:13 a.m. IST on Friday, Microsoft said engineers were continuing infrastructure repairs and checking whether recovery changes had taken effect. The incident remained classified as service degradation.
Microsoft also said it was not aware of malicious activity causing the incident. That statement does not replace the pending technical investigation. The update did not announce full restoration or provide a confirmed completion time.
What Should Users Do When Outlook Is Down?
Start with Microsoft’s service-status page. For workplace accounts, ask the IT team whether the incident affects your organisation. Microsoft’s service-health guidance recommends checking known incidents before spending time on local troubleshooting.
- Administrators: Open Health > Service health in the Microsoft 365 admin centre. Review Exchange Online incident EX1550543 and the wider Microsoft 365 incident MO1550821.
- Employees: Keep the error message and time of failure for your IT team. Use an organisation-approved alternative channel for urgent communication.
- Anyone awaiting an important email: Confirm delivery with the sender once access returns instead of assuming an empty inbox means nothing arrived.
A working browser session may help establish whether the problem is limited to an application, but Outlook on the web was also among the affected connection methods. Switching devices therefore offers no guaranteed workaround.
Follow Microsoft’s incident notices for confirmation of restoration before treating the disruption as resolved.
Frequently Asked Questions
Is microsoft outlook working again?
Microsoft had not confirmed full restoration in its 11:13 a.m. IST update on 13 November 2026. Engineers were still repairing infrastructure and checking whether recovery changes had worked.
Did the outlook outage delete emails?
The incident notices reviewed describe mailbox connectivity problems, not confirmed email deletion. An inaccessible inbox does not establish data loss; ask your IT team about missing messages.
Will reinstalling outlook fix the outage?
Reinstalling Outlook will not repair Microsoft’s affected servers. Check service health first; ask your IT team about application troubleshooting if access remains unavailable after Microsoft confirms restoration.
Where can administrators track the outage?
Administrators can open Health > Service health in the Microsoft 365 admin centre. Exchange Online updates appear under EX1550543, while MO1550821 covers the wider Microsoft 365 disruption.
When Will Microsoft Fully Restore Outlook?
Microsoft had not announced a confirmed completion time in the update reviewed. Use its incident notices to follow recovery rather than relying on an estimated deadline shared elsewhere.
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