Using Classic Outlook on Windows for personal email, calendar, and contact management
We had the same issue and following this Microsoft Article fixed issue:
Teams Meeting add-in is missing in Outlook Desktop after updating to New Teams - Microsoft SupportAll you need to do is to make sure that Microsoft Teams Meeting Add-in for Office is uninstalled, then close and re-open Teams, which causes Outlook Plugin to re-install.
Thank you for this. We found too that we had to uninstall Microsoft Teams Classic and the Teamswide installer if it exists (which actually uninstalls Classic).
What a pain it has been.
Colin