Login to your Teams Account. And Click on the three dots from the left panel. Search for Clerk Chat or SMS, the Clerk SMS integration app will appear. Click on the App.
A new Page will pop up. Just click on "Add" button.
Immediately the Clerk App will get integrated with your Teams Account on the left panel. Right-click on the Clerk Chat icon from the left panel to pin it.
Rolling Out Clerk to Enterprise
You can provide Clerk to an individual, team, organization, or anyone who wants to use it in your Microsoft Teams environment. As an admin, you use Microsoft Teams app setup policies to install and pin Clerk app.
Reference Microsoft Documentation for full breakdown on app policies:
Manage app setup policies in Microsoft Teams - Microsoft Teams
Learn how to pin apps, install apps, and allow users to upload custom apps by creating, editing, and managing app setup policies.