"Microsoft will end support for Internet Explorer 11 across its Microsoft 365 apps and services next year. In exactly a year, on August 17th, 2021, Internet Explorer 11 will no longer be supported for Microsoft’s online services like Office 365, OneDrive, Outlook, and more. Microsoft is also ending support for Internet Explorer 11 with the Microsoft Teams web app later this year, with support ending on November 30th.
While it’s still going to take some time to pry enterprise users of Internet Explorer 11 away, Microsoft is hoping that the new Internet Explorer legacy mode in the Chromium-based Microsoft Edge browser will help. It will continue to let businesses access old sites that were specifically built for Internet Explorer, until Microsoft fully drops support for Internet Explorer 11 within Windows 10. Microsoft’s move to stop supporting Internet Explorer 11 with its main web properties is a good first step, though.
Alongside the support changes, Microsoft is also planning to drop support for its existing legacy version of Microsoft Edge on March 9th, 2021. After the end of support date, the legacy version of Edge will no longer receive security updates. Microsoft has been moving existing Windows 10 users over to new its Chromium-based Edge browser, and the company says new devices and future Windows feature updates will all include the new Edge browser."