Microsoft released a new version of the Teams desktop and web apps in October, 2023 called New Microsoft Teams. New Teams has started to become generally available to campus and users are encouraged to begin using and transitioning from Classic to New Teams on UI and personal devices.
Note that any remaining users of Classic Teams will be automatically updated to New Teams after March 31, 2024.
New Microsoft Teams has been re-built from the ground up for a faster, lighter, more efficient and flexible experience. The client has also simplified and streamlined joining meetings and interacting with chats and channel messages. Much of the New Teams interface will look familiar, but there are some changes to be aware of.
Detailed information on New Teams is available on Microsoft's website:
https://learn.microsoft.com/en-us/microsoftteams/new-teams-mac-install-prerequisites