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Microsoft says cyber-attack triggered latest outage
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A global outage affecting Microsoft products including email service Outlook and video game Minecraft has been resolved, the technology giant said in an update.
The firm said preliminary investigations show the outage was caused by a cyber-attack and a failure to properly defend against it.
Earlier, the company issued an apology for the incident, which lasted almost 10 hours and caused thousands of users to report issues with Microsoft services.
It comes less than two weeks after a major global outage left around 8.5 million computers using Microsoft systems inaccessible, impacting healthcare and travel, after a flawed software update by cybersecurity firm CrowdStrike.
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"While the initial trigger event was a Distributed Denial-of-Service (DDoS) attack... initial investigations suggest that an error in the implementation of our defences amplified the impact of the attack rather than mitigating it," said an update on the website of the Microsoft Azure cloud computing platform.
DDoS attacks work by flooding a website or online service with internet traffic in an attempt to throw it offline, or otherwise make it inaccessible.
"It seems slightly surreal that we’re experiencing another serious outage of online services from Microsoft," said computer security expert Professor Alan Woodward.
“You’d expect Microsoft’s network infrastructure to be bomb-proof."
Earlier, An alert on the technology giant's service status website said the outage affected Microsoft Azure - the cloud computing platform behind many of its services - and Microsoft 365, which includes systems like Microsoft Office and Outlook.
It also listed its cloud systems Intune and Entra as among those impacted.
Microsoft said it had implemented a fix for the problem which "shows improvement", and it would monitor the situation "to ensure full recovery".
"We sincerely apologise for the inconvenience," it said in a post on X, formerly Twitter.
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