Microsoft outage live: Microsoft prioritising ‘life, safety and government services’ as global outage wreaks havoc for Outlook users
The impact is largely on email systems and appears to be sparked by an update issue. Microsoft has said there is no indication of a cyber attack.

TL;DR
- Microsoft email systems are experiencing a widespread outage.
- The problem is thought to be caused by an update issue.
- Microsoft has stated that there is no indication of a cyber attack.