This article describes how you can use Collaboard in Microsoft Teams
Collaboard Microsoft Teams App
To install the Collaboard app in Microsoft Teams go to Apps and search for Collaboard.
Collaboard is now available as app and you can pin it on the left toolbar in Microsoft Teams. When you open the app, login to Collaboard. You get now the full Collaboard app with all features directly in Microsoft Teams.
Add a single Collaboard project as a tab to a Microsoft Teams channel
To add a single Collaboard project as a tab use the Website tab feature of Microsoft Teams.
Enter the project name as "Tab name" and copy & paste the URL of your Collaboard project into the "URL" box.