Microsoft is investigating an ongoing outage that is preventing OneDrive customers from accessing the cloud file hosting service worldwide, just as a threat actor known as 'Anonymous Sudan' claims to be DDoSing the service
“The impacted browser URL is onedrive.live.com. Access to the OneDrive service using the desktop client, a synchronization client or Office clients are not impacted,” Microsoft said.
So, just the website then.
And that’s only for the personal OneDrive service. Business accounts are “https://YourOrg-my.sharepoint.com” for OneDrive access.