https://www.microsoft.com/en-us/microsoft-teams/free-classic-retirement
After April 12, 2023, Microsoft Teams Free (classic), the legacy free Teams app for business, will no longer be available.
Upgrading to Microsoft Teams Essentials is the easiest way to continue using Teams and maintain access to all your chats, files, teams, and meetings. Teams Essentials also provides unlimited group meetings for up to 30 hours in length with up to 300 participants per meeting, and 10 GB of cloud storage per user—all for only $4.00 per user/month.1..
