Microsoft has declared in a blog post on October 11 that an Azure customer was hit with a 2.4 Tbps DDoS attack during August. The attack was recorded as the highest DDoS event ever on the Azure platform beating last year's 1 Tbps attack. This attack was also the second highest documented event, coming second to Google's attack with 2.5 Tbps in 2017.
https://www.notebookcheck.net/Microsoft-fends-off-a-2-4-Tbps-DDoS-attack-classed-as-the-second-largest-in-history.571800.0.html