A large Microsoft cloud outage that began on Thursday, November 12, 2026, was still not fully resolved on Friday, November 13. It has disrupted Outlook email, Teams, Copilot and other Microsoft 365 services around the world. For readers, the practical meaning is simple: if your work or school email is slow or unreachable, the fault is most likely on Microsoft's side, and there is little you can fix yourself.
Key facts
- The problems started on Thursday, November 12, and Microsoft had not announced full recovery by Friday morning US Eastern time.
- Outlook was hit hardest. Teams, Copilot, OneDrive, SharePoint Online and Defender were also named in reports.
- Microsoft says it has no indication of malicious or cyber activity. A root cause has not been published.
- Downdetector tracked reports from 74 countries and territories within about an hour, according to Al Jazeera and NBC News.
- Microsoft has promised a Post-Incident Report once the problem is mitigated.
What changed
Microsoft first pointed to elevated infrastructure load across several regions. It later said the load did not come from extra traffic. Instead, some servers became unexpectedly unavailable, and the remaining servers were strained as a result. In a later update reported by BleepingComputer, the company said a core process on affected servers was becoming overwhelmed, which caused a loss of capacity.
To recover, Microsoft paused deployments, redistributed connection traffic around the world and restarted affected servers. NBC News reports that it described its method as draining traffic, restarting, fixing and then returning servers to service in stages, starting with the Asia Pacific region. Microsoft also said it applied an "upstream authentication/routing configuration component patch" and saw positive results for server stability. It was also considering reverting a small number of recent configuration updates.
Recovery has been uneven. Al Jazeera reported that Microsoft described only "marginal success" at one point, and that some restored servers failed again. NBC News quoted Microsoft describing "early stabilization" while warning that capacity had not returned to normal and some users could still see intermittent problems.
What is not yet confirmed
- Root cause: Microsoft has not said why the servers became unavailable. Analysts have suggested several theories, but those are speculation. Whether a recent patch or network change played a part is not yet confirmed.
- Start time: The reports give different clock times for the start of the incident, so the exact moment is not yet confirmed.
- Number of users affected: Microsoft has not published a figure. Downdetector counts show how many people reported problems, not how many were affected.
- Full recovery time: No timeline has been given.
How it affects readers
Most people felt this at work or school. Outlook mailboxes were unreachable through the web, app and mobile, and many messages arrived late. Al Jazeera reports that government systems, courts and police agencies in several countries were disrupted. NBC News lists examples of workarounds that local organizations announced: a Colorado county jail required bail to be paid in person, a UK police force asked people to call its non-emergency line instead of using online forms, and the City of Austin and Baltimore County said phone lines and 911 stayed operational even though email was down.
Microsoft says it extended an email timeout window to 48 hours so delayed messages are not simply dropped. That should help important mail eventually arrive, but delivery may be late.
Practical steps
| Situation | What to do |
|---|---|
| You cannot sign in or load your mailbox | Check the Microsoft 365 status page or the company's status account on X before changing passwords or reinstalling apps. |
| You need an urgent reply | Use a phone call or a text, or another channel your employer has approved. |
| You use desktop Outlook | Mail that was already downloaded may still be readable, but new mail may not sync. |
| You are an IT administrator | Follow your service health dashboard and plan a minimum set of services that can run without the affected tools. One analyst quoted by Al Jazeera advised this. |
| You are waiting on a time-sensitive message | Ask the sender to confirm by another channel, since delayed email may take hours to appear. |
Be careful about scams while the outage lasts. Messages that claim to fix your account and ask for your password should be treated with suspicion. Go to the official status page instead of following links in an unexpected email.
What to watch next
- Whether Microsoft declares the incident resolved, and whether restored servers stay stable.
- The Post-Incident Report, which should explain the cause and any link to recent configuration changes.
- Whether any business customers receive service credits or other remedies. Nothing has been announced.
- Whether the incident prompts organizations to build backup communication plans.
FAQ
Was the Microsoft outage a cyberattack?
Microsoft says it has no indication of malicious or cyber activity. The final cause has not been published, so that could change if the investigation turns up something new.
Will I lose emails sent during the outage?
Microsoft says it extended the email timeout window to 48 hours to protect delayed messages. Whether any individual message is affected is not yet confirmed.
Is there anything I can do to fix it?
Not really. The problem is on Microsoft's servers. Check the official status page, wait for recovery and use another channel for urgent matters.
Sources
- Al Jazeera, Microsoft hit by global outages: What happened and why?
- NBC News, Microsoft outage hits Outlook, Teams across the world
- BleepingComputer, Massive Microsoft 365 outage disrupts Outlook, Teams, Copilot worldwide
This article is an independent summary based on the sources listed above.