Microsoft services are currently experiencing an outage in the U.S., Europe, and other parts of the world. Windows Store, Xbox Live, Outlook, OneDrive, SharePoint Online and Power BI all affected. Microsoft has confirmed that they’re aware of the problem and are working on restoring access. It is not known if this is planned maintenance activity, a problem with their servers, or if the networks are under attack. This is a developing story and will be updated as more information becomes available.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-store-outlook-and-xbox-live-are-down-worldwide/