Microsoft as made a fundamental change to the Edge browser. The new Edge is faster, more secure, supports Adobe Acrobat forms, and provides easy syncing of bookmarks and history between computers that you sign on to.
Campus manged computers (including computers in classroom (lecture rooms) will be upgraded in early June 2020. Users can upgrade to the new browser before then using the Company Portal. For more information, read KB 101352
Users of unmanaged computers can expect Edge to be automatically upgraded as part of the Windows Update later this year.
macOS, iOS and Android users can use the new Edge as well: https://www.microsoft.com/en-us/edge/business