Microsoft Exchange and the calendar function in Teams are currently unavailable. Many users who cannot view or send emails also experience problems and crashes in Outlook.

Crisis for those working in the Microsoft ecosystem: Exchange is down. The calendar function in Microsoft Teams is also broken. Others complain about Outlook’s instability when they want to view or send emails.

Microsoft said it had “found a recent change that may have caused the error.”

“We have begun reverting the change and are investigating what additional actions are needed to mitigate the issue,” Microsoft said on social media platform X.

According to Euronews, users in the Netherlands, Poland, France and Sweden are reporting on X that they are having problems with Microsoft Outlook.

Here is the latest update from Microsoft at 3:00 p.m. (November 25): “We have begun deploying a fix that is currently being distributed in the affected environment. As we move forward, we will begin manual restarts on a subset of machines that are in an unhealthy state. For more information, see MO941162 in the Admin Center.”