Microsoft has announced that from 17 August 2021, all Microsoft 365 apps and services will no longer support Internet Explorer 11 (IE11). This follows Microsoft’s announcement last November that Microsoft Teams would no longer support IE11.
After 17 August 2021, you'll have a degraded experience or will be unable to connect to Microsoft 365 apps and services on IE11. New Microsoft 365 features might not be available, and certain features may cease to work.
To avoid this problem and get the most out of Microsoft 365, you need to start using the new Microsoft Edge browser.