Admins of my employer informed employees that we should switch to new Microsoft Teams app by the end of this month. GA of new client was announced In October last year https://learn.microsoft.com/en-us/microsoftteams/teams-classic-client-end-of-availability Announcing general availability of the new Microsoft Teams app for Windows and Mac https://techcommunity.microsoft.com/t5/microsoft-teams-blog/announcing-general-availability-of-the-new-microsoft-teams-app/ba-p/3934603
