14 DAY TRIAL // A major outage that took place earlier this week made it impossible for users to access their Microsoft 365 services, and now Microsoft has published the results of its investigation to reveal what exactly went wrong.
The outage impacted the majority of Microsoft 365 services, including Microsoft Teams, Exchange Online, SharePoint Online, Microsoft Graph API, and OneDrive for Business.
Microsoft says users encountered delays and failures when trying to log in, as well as errors when performing searches or accessing the calendar features.
The software giant explains that users in Western Europe were mostly affected by the outage, however, subscribers in other parts of the world also experienced similar issues when trying to access their Microsoft 365 accounts.
“We've confirmed from our updated service monitoring that all services remain healthy following the targeted restarts. Additionally, we completed our investigation into the potential remaining impact to Outlook on the web and confirmed that this is a known issue which is unrelated to this event,” Microsoft explained.
“Impact was most severe in Western Europe but would also have impacted a small percentage of users located throughout EMEA, North America, and the Asia-Pacific regions.”
What caused the outage
So what exactly caused the outage? The Redmond-based software giant says it all started with an infrastructure power outage that therefore led to problems for Microsoft 365 users in Western Europe.
“An infrastructure power outage necessitated failing over Microsoft 365 traffic management servicing users primarily in Western Europe. This action failed to property complete, leading to functional delays and access failures for several Microsoft 365 services,” the company explained.
The issue has already been resolved, so right now, everything should be working properly for all Microsoft 365 subscribers both in Western Europe and in other parts of the world. All services are working correctly, according to the service status page.