---
title: "Massive Microsoft service outage: thousands of users left without access to Outlook, Teams, and Copilot"
description: "On November 12, a massive Microsoft service outage occurred: according to Downdetector, over 130,000 users in the US could not access Outlook, with further outages reported in Teams, Copilot, and Microsoft 365."
date: 2026-11-12T22:25:26.402Z
lang: en
url: https://xab.info/en/posts/massive-microsoft-service-outage
tags: [microsoft, outlook, teams, copilot, microsoft-365, outage, cloud-services]
author: "Alexander Buran, Roman V."
publisher: "XAB.info"
---

# Massive Microsoft service outage: thousands of users left without access to Outlook, Teams, and Copilot

![Microsoft logo on the facade of a modern office building with autumn trees](https://xab.info/media/2026/11/12/massovyy-sboy-v-servisakh-microsoft/massovyy-sboy-v-servisakh-microsoft-1.webp)

## Key Points

- On November 12, a massive outage affected Microsoft services, including Outlook, Teams, Copilot, and Microsoft 365.
- According to Downdetector, over 130,000 users in the US reported problems with Outlook, and over 46,000 reported outages in Microsoft 365.
- Microsoft confirmed the incident, citing increased infrastructure load, and announced traffic redirection between nodes.
- Downdetector figures represent user reports and do not necessarily match the real number of affected users.

On Thursday, November 12, a massive outage hit Microsoft's cloud services, causing disruptions for thousands of users globally. The glitches primarily affected the Outlook mail platform, as well as the communication tool Teams, the AI assistant Copilot, and other components of the Microsoft 365 ecosystem. According to the monitoring service Downdetector, which aggregates user reports, the outage was particularly noticeable in the Americas, although complaints were also recorded in other regions.

### Scale of the outage according to Downdetector

The peak of complaints occurred in the middle of the day according to US Eastern Time. Around 1:30 PM local time (7:30 PM Italian time), more than 120,000 users reported difficulties with Outlook, and later, according to Downdetector, the number of reports exceeded 130,000. Major issues included inability to log into mailboxes, send or receive emails, as well as delays in email delivery. Separate outages were recorded in Microsoft 365 — reported by over 46,000 users — as well as in Teams, which is widely used in corporate environments: about 3,000 people claimed difficulties with access. Complaints also came from users of Copilot, Microsoft's AI assistant.

### Microsoft's response and recovery measures

The company confirmed it is investigating the causes of the outage. In a series of updates on X, Microsoft initially stated it received reports from users unable to access Exchange Online mailboxes through various connection methods in the Americas. In a subsequent statement, the company pointed to a probable cause: a portion of its infrastructure was experiencing higher-than-normal load, which, it estimated, caused connection errors. To mitigate the impact, Microsoft announced the redirection of traffic between infrastructure nodes to level out the load and restore connectivity. Separately, the company noted that Teams service in North America had been restored, although some users continued to report connection difficulties.

### Caveats and context

Microsoft did not immediately provide a full assessment of the number of affected users and did not disclose all details regarding the causes of the outage. It is important to note that Downdetector figures reflect the number of user reports and not necessarily the actual number of affected individuals, as a single person may submit multiple complaints. Outages in Microsoft services are not an isolated episode: previously, in August 2026, according to the same Downdetector, multi-hour outages were recorded in GitHub, Copilot, and Teams, pointing to the recurring nature of such incidents in the company's cloud infrastructure. At the time of publication, Microsoft was continuing its work to stabilize the services.

## Fact-Check & Sources

- [Сбой сервисов Microsoft оставил тысячи пользователей без доступа к Outlook, Teams и Copilot](https://ru.euronews.com/2026/11/12/microsoft-experiences-outages-on-outlook-and-teams-thousands-of-users-without-email-issues) - Primary source: description of the November 12 outage, Downdetector figures (120-130k for Outlook, 46k for M365, ~3k for Teams), Microsoft statements on load and traffic redirection.
- [В работе сервисов Microsoft произошел массовый сбой](https://www.kommersant.ru/doc/8891564) - Confirms a massive outage in Microsoft services (including GitHub, Copilot, Teams) based on Downdetector; GitHub press office also confirmed issues.
- [В работе сервисов Microsoft произошел многочасовой сбой](https://www.vedomosti.ru/technology/news/2026/08/18/1221820-v-microsoft-sboi) - Refers to a separate earlier incident (per URL — August 18, 2026, mentions of July 20 and August 6). Used only as context regarding recurring outages; its figures (2700 complaints, 60% Copilot, 80% Teams) were not applied to the November 12 event.

## FAQ

### Which Microsoft services were affected by the November 12 outage?

Primarily Outlook (email), as well as Microsoft 365, Teams, and the AI assistant Copilot. According to Downdetector, outages were also recorded in other tools within the ecosystem.

### How many users reported problems?

According to Downdetector, in the US, over 130,000 users reported difficulties with Outlook, over 46,000 with Microsoft 365, and about 3,000 with Teams. These figures reflect user reports and do not necessarily match the actual number of affected users.

### What did Microsoft say about the cause of the outage?

The company confirmed the incident, stating that a portion of its infrastructure was experiencing higher-than-normal load, which likely caused connection errors. To restore access, Microsoft announced the redirection of traffic between infrastructure nodes.

### Has the service been restored?

Microsoft reported that Teams service in North America was restored, although some users continued to complain about connectivity. A full assessment of the number of affected users and all causes had not been disclosed at the time of publication.