Is your inbox spinning endlessly and refusing to send your messages? You’re not alone. An Outlook outage is disrupting email access for a huge number of users this Thursday, November 12, 2026, in Paris, the Île-de-France region and well beyond. From La Défense (Hauts-de-Seine) to offices across Paris, the end of the day is proving difficult for everyone who works with the Microsoft 365 suite. The problem is neither your computer nor your internet connection.
The first reports came in late afternoon. On Downdetector, the platform that tracks incidents reported by users, alerts surged from around 6:30 p.m. Paris time. In the United States, broadcaster PIX11 reported more than 100,000 reports in barely an hour.
Microsoft acknowledged the incident on its Microsoft 365 Status account. The company says it is investigating issues accessing Exchange Online mailboxes, the service that hosts Outlook business email. The incident is listed under code EX1550543 in the admin center for businesses.
Yes. In its first message, Microsoft referred only to the Americas. The company later broadened the scope in a post on its X account: the issue may now affect users worldwide trying to sign in to Microsoft 365 services.
All access points appear to be affected. Microsoft lists Outlook on the web, the desktop app, email synchronization on smartphones and third-party apps that connect to the email service. In other words, switching devices won’t get you out of trouble.
Microsoft’s official notice applies to business accounts on its Business and Enterprise plans. The situation for personal addresses (Hotmail, Live or Outlook.com) remains less clear. Several internet users have nevertheless reported on social media that emails sent to these addresses are being rejected.
Microsoft is offering an initial explanation. According to the software giant, part of its infrastructure is experiencing overload in several regions around the world, which would largely explain the connection errors. To picture the situation, imagine a single service desk being mobbed: requests pile up faster than they can be handled, and many go unanswered.
The American giant is now tracking the incident under two reference numbers, EX1550543 and MO1550821, and points users to its official status page. As we write, it has provided neither the number of users affected nor a timeline for a return to normal.
It’s not the first outage alert of the week. On Monday, November 9, users in Europe, the Middle East and Africa had already struggled to open their Outlook webmail for about four and a half hours, according to incident tracker IsDown. On a different scale, the incident recalls the major outage affecting Facebook, Instagram and WhatsApp in June, or the one affecting the Orange and Sosh mobile networks in October.
The best course of action is to be patient. The outage is on Microsoft’s servers: reinstalling Outlook, changing your password or clearing the cache won’t fix anything, and could even make things more complicated when service returns to normal.
To follow the incident’s progress, two sources are authoritative: the official Microsoft services status page and the Microsoft 365 Status account on X. If an urgent message absolutely has to go out tonight, it’s best to use a phone call, text message or another email address. Businesses should make a note of when the outage began and ended, in case they need to file a claim with their IT provider.
And if your inbox stays quiet all evening, it may be a sign to step away from the screen and plan your weekend outings in Paris and Île-de-France.
We’ll update this article as soon as Microsoft provides information about the cause of the outage and when services will return to normal.
