There has been today major changes to functionally regarding to where the customers who has Office 365 Business Essentials, Office 365 Business or Business premium.
They can now buy Microsoft 365 Business Voice (without calling plan). They will now get Phone-system and AudioConferencing included.
For the amout of 11EURO per month per user you will get the following.
As we can see here this is the new one that you can get today. But you will need to have Direct Routing. Does your CSP know how to figure Direct Routing? If not, well then send me an mail and we will help you. You can send mail to:Direct Routing.