---
title: "Microsoft 365 outage disrupts Outlook, Copilot and shared links"
description: "A widespread Microsoft 365 outage is disrupting Outlook, Copilot and shared links. Here's what's affected, Microsoft's latest explanation and what to do."
canonical_url: "https://shortformtech.com/posts/microsoft-365-outage-outlook-copilot-links"
---

> Index of every page on this site: [llms.txt](https://shortformtech.com/llms.txt)

If Outlook isn't loading, Copilot has stopped responding or links shared by colleagues keep timing out, the problem may not be at your end. A widespread **Microsoft 365 outage** is disrupting email and several connected workplace services.

The incident began on Thursday 12 November and continued into Friday. Microsoft's [service-health updates, reproduced by the University of Pennsylvania](https://mailservices.isc.upenn.edu/computing/email/penno365/alerts/ms-incidents.html), describe problems reaching Exchange Online and features that depend on it. [Associated Press](https://apnews.com/article/d92547a821930290db2964388016979a) reports disruption to businesses and public services in multiple countries.

## What's affected?

Microsoft's incident notices identify several distinct problems:

- **Outlook and Exchange Online:** Mailboxes may be inaccessible through web and desktop clients, and messages may be delayed.
- **Microsoft 365 Copilot:** Chat may fail to load or respond, and access to work data such as email and calendars may be disrupted.
- **Shared links:** Microsoft Defender for Office 365 Safe Links may fail to verify URLs, so clicking links from Outlook or Teams can time out.
- **Teams:** Features that depend on Exchange, including calendars and meeting scheduling, may fail. Core messaging and meetings remain largely functional.
- **SharePoint and other apps:** Some Exchange-dependent features are affected, although direct access to SharePoint files may still work.

That distinction matters: a colleague might be able to join a Teams meeting but not schedule one, or open a file directly but not follow the link in an email.

## What caused it?

Microsoft has been investigating servers that stop processing requests when a component responsible for secure connections becomes overwhelmed. Its updates describe traffic-management changes, server restarts and a configuration patch intended to restore stability.

The company reported improving server stability as the patch was expanded, but that is **not the same as confirming a full recovery**. Microsoft's root-cause investigation is still ongoing. It has said it is not aware of malicious activity causing the incident.

[CIO's coverage](https://www.cio.com/article/4248249/microsoft-struggles-to-get-m365-services-back-online-after-widespread-outage.html) describes how initial recovery attempts were complicated by servers becoming unresponsive again when traffic returned.

## Why one outage affects so many tools

Microsoft 365 looks like a collection of separate apps, but its products share services and data. Copilot needs access to workplace information; Teams scheduling depends on Exchange; and Safe Links checks URLs before users open them.

That creates a wider blast radius. Even if a particular app is still running, a dependency it relies on can fail.

The outage is a reminder that adding AI to daily work doesn't remove the need for resilient infrastructure. In some cases, it adds another workflow that depends on the same underlying systems.

## What can you do?

Try opening files directly from an approved SharePoint or OneDrive location rather than a link that is timing out. For urgent work, use another company-approved communication channel. Check your organisation's Microsoft 365 service-health updates for tenant-specific impact.

Avoid switching off Safe Links or bypassing company security policies to work around a failed link. Reinstalling Outlook is also unlikely to help when the service itself is disrupted.

**This is a developing incident.** Recovery may vary by region and organisation; the information above reflects reports available on 13 November 2026.

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