Microsoft had a big error. This happened on Monday night. Millions of people had problems. They could not write or read mail. This hit people and firms.
Outlook and Microsoft 365 did not work. Many users wrote about the error online. A problem in the cloud was the cause. An important part for the login was broken.
Tech workers from Microsoft fixed the error. They put in fixes at night. Now the services work normal again. Some users still wait a bit. Many mails wait in the queue.