Key facts
- Microsoft said some of its servers were unexpectedly unavailable, straining the remaining infrastructure.
- Microsoft said it was working to bring users back online.
Microsoft said some of its servers were unexpectedly unavailable, straining the remaining infrastructure, and that it was working to bring users back online, according to a report that did not date the event.
The company did not name the services affected, the number of users hit or a cause for the outage. It also gave no estimate of when service would be restored.