Microsoft announced today new temporary changes to Office 365 services to adjust to the ever-increasing demand and the growing number of new Microsoft 365 customers working from home during the COVID-19 pandemic. Microsoft also announced on March 5th that Microsoft Teams will be free during the next six months to give businesses a helping hand while moving towards a remote workplace during the novel coronavirus outbreak. Microsoft Teams saw a huge influx of 12 million new daily active users within a single week bringing the total to 44 million.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-cuts-back-more-office-365-features-to-handle-high-load/