Microsoft logo on the facade of one of its stores
(Source: Adobe Stock)
  • Microsoft (NDAQ:MSFT) confirms the outage on Tuesday was caused by a distributed denial of service attack
  • Users were unable to access many Microsoft services Tuesday, including Office, Outlook and Azure
  • The incident lasted roughly 10 hours and had thousands of users reporting issues with Microsoft services
  • Shares of Microsoft are down 1.59 per cent to US$416.20 as of 12:01 pm ET

Microsoft (NASDAQ:MSFT) has confirmed that the outage that took place on Tuesday was caused by a distributed denial of service (DDoS) attack.

Over the course of 10 hours on Tuesday, users were unable to access many Microsoft services such as Office, Outlook and Azure.

In an update, the company stated that although the initial trigger event was a DDoS attack that activated its DDoS protection mechanism, “initial investigations suggest that an error in the implementation of our defences amplified the impact of the attack rather than mitigating it.”

A DDoS attack is described as an attack on a website meant to disrupt normal traffic and essentially force the service offline.

Moving forward, the company stated it will post a preliminary post-incident review within 72 hours with more details on what occurred and will then publish within 14 days a final post incident review with any additional details.

The cybersecurity attacks occurred in the midst of Microsoft reporting its most recent earnings that highlighted revenue of $64.7 billion, an increase of 15 per cent from Q4 2023.

“Our strong performance this fiscal year speaks both to our innovation and to the trust customers continue to place in Microsoft,” Satya Nadella, CEO of Microsoft, said in a statement. “As a platform company, we are focused on meeting the mission-critical needs of our customers across our at-scale platforms today, while also ensuring we lead the AI era.”

Shares of Microsoft Corp. (NDAQ:MSFT) are down 1.59 per cent to US$416.20 as of 12:01 pm ET.

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(Top photo: Adobe Stock)


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