Last updated: Friday, November 13, 2026, 08:15 CET
Since Thursday evening, November 12, Microsoft 365 has been largely down worldwide. Signing in often fails, Outlook does not send or receive mail and Teams meetings will not start. SharePoint, OneDrive and Copilot are affected too. Microsoft does not have the outage under control yet.
We keep you updated on our status page for as long as the outage lasts.
What happened?
The problems started on Thursday evening with connectivity issues in Exchange Online, the service behind business Outlook mailboxes. It soon turned out to be wider: within an hour, reports came in from 74 countries, peaking at almost 140,000 reports.
According to Microsoft it is not a cyberattack. Part of its servers went down, after which the remaining infrastructure could no longer handle the load. Microsoft is restarting servers, redistributing traffic and has paused all deployments. Some regions show partial recovery, but restored servers sometimes fail again. There is no recovery time yet.
Administrators can follow the status in the Microsoft 365 admin center under incident MO1550821.
Our advice
Still connected? Do not sign out. Signing in again often fails right now. Keep Outlook and Teams open if they still work.
Do not reset passwords or reconfigure accounts. That will not fix this outage and can make recovery harder for you.
Agree on a fallback with your team. For example phone, text or a shared mobile group, so you stay reachable for colleagues and customers.
Watch out for phishing. Scammers are using the outage and pose as a helpdesk or as Microsoft. In doubt about a message or call? Call us first.
What keeps working
Our own services are running. uWebChat Voice, uCompose, uDeliver and our other services keep running normally.
Calling through uWebChat Voice with Direct Routing. Your telephony then does not run through Microsoft: you stay reachable on your regular numbers. In the portal you can redirect incoming calls to a mobile number yourself while Teams is down. Read more about uWebChat Voice.
Questions?
Questions about the outage or your own environment? Get in touch. For a specific issue, create a ticket in the portal.
An outage of this size is rare, but it shows how dependent many organisations are on a single platform. Want to know what stops working for you if Microsoft 365 is down for a day, and how to absorb that? We are happy to think it through with you.
