Bleeping Computer report on the Level 7 DDoS attack on Microsoft services, including Azure Portal and M365, by a group linked to Sudan. Or possibly that is a cover for a Russian group.
https://www.bleepingcomputer.com/news/microsoft/microsoft-confirms-azure-outlook-outages-caused-by-ddos-attacks/
Microsoft confirms Azure, Outlook outages caused by DDoS attacks

Microsoft has confirmed that recent outages to Azure, Outlook, and OneDrive web portals resulted from Layer 7 DDoS attacks against the company's services.

BleepingComputer