Offline: Microsoft authentication issue takes out world
Users of Microsoft's cloud-based services were offline for a large part of yesterday following an authentication issue.
Users of Microsoft Office 365, Outlook, Exchange, Sharepoint, OneDrive, Azure and Teams were unable to log on to their apps, instead receiving a "transient error" message. Some users who were logged into apps at the time of the failure remained logged in and able to access services, which suggests an authentication issue somewhere in the service.
Diagnosis of the problem is still underway and while initially Microsoft blamed a software upgrade, rolling back the changes didn't bring about any change in the problem. Microsoft resolved the issue later in the day but details as to the cause remain unclear.
The problem impacted users around the world and lasted for a couple of frustrating hours, however with cloud-based services increasingly being the standard model deployed by application providers, such outages are now part of the rich tapestry that is our modern working lifestyle.
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