To use Call2Teams and Call2Teams Go, you need a Microsoft 365 license per employee, an available Microsoft 365 license, and one Microsoft Teams Phone license per solution.
To use Call2Teams and Call2Teams Go, you need a Microsoft 365 license per employee, as well as one additional available Microsoft 365 license (the available Microsoft 365 license is only required during setup/updates).
If you are using Call2Teams Go, you only need one Microsoft Teams Phone license per solution, as this license grants access to activate the two Microsoft Teams Phone Resource Account licenses required for calls with Call2Teams Go.
If you want to use Call2Teams, you need one Microsoft Teams Phone license per user, as well as two available Microsoft Teams Phone Resource Account licenses.
Note: The Microsoft Teams Phone Resource Account license must be activated through the Microsoft portal. If the Microsoft portal is in Danish, the license is called Microsoft Teams-telefonressourcekonto.
If you also want the ability to create conference calls in Microsoft Teams that external phone numbers can dial into, you will need the Microsoft Teams Audio Conferencing license.
If the Microsoft portal is in Danish, the license is called Microsoft Teams-lydmøde.
You can view an overview of the contents of the different Microsoft 365 licenses here.