Teams Add-in Not Showing Within Outlook The add-in for setting up a teams meeting within the outlook application was no longer showing. The add-in was not available to be enabled within Outlook as per Troubleshoot the Teams Meeting add-in in Outlook for Windows. Even after reinstalling Teams or creating a new profile within Outlook, it did not fix the issue. As a workaround I was using Use Team calendar to create meeting Use Outlook Web App to create meetings With Microsoft Support’s help via a case we identified the issue was the missing following key: