@TimGran1964 Hello, well. Office Home or Office 2019 isn't the solution so I have no idea why this was installed "by Microsoft" as Teams isn't included?
Anyway, to have the Teams add-in available in the Outlook client it's necessary to install the Teams desktop application. Even installed correct, the add-in is sometimes blocked in the client and can be enabled either from File - Options - Add-ins or the registry.
But first of all, make sure you're using an eligible subscription for Teams. See this table for more info