2.1.Install from AppSource
Go to the Microsoft AppSource, and simply search for the teamsTALK app in the search textbox. The app is officially available for businesses and individuals in Microsoft AppSource.
When you click on the Get it now button, first, you will have to sign in to Microsoft AppSource or sign up if you don’t have an account.
When the user clicks on the Continue button, a confirmation page will appear, from where the user can open the Outlook in Web, check the guide about the Add-ins if can’t find the Add-in in Outlook or need some help with the installation.
Now you can start using the app. In OWA (Outlook on the Web), just select an email, click on the context menu and scroll down until you find the teamsTALK app. In Outlook (desktop version), the app will be displayed on the toolbar, or you can find it in the same way as in OWA. For more information about starting the app read this section.