Teams is natively integrated; no separate add-in installation is required.
If you have Outlook but cannot see the Teams meeting button, follow these steps to "download" or enable the integration: 1. Download and Install the Teams Desktop App how to download microsoft teams in outlook
Troubleshoot the Teams Meeting add-in in Outlook for Windows Teams is natively integrated
The add-in requires the full desktop client to function. If you are only using the web version, you must install Teams on your machine first. 2. Enable the Add-in Within Outlook how to download microsoft teams in outlook
If the app is installed but the icon is missing, you may need to manually enable it: