The last part is about creating a Roomlist, to get the Surface Hub as Resource in Teams Meetings Requests. Learned from Yoav (https://y0av.me/2018/11/07/add-surface-hub-and-srs-rooms-to-microsoft-teams-meetings/)
#1: Connect Exchange Online with MFA
If you are using MFA for you Admin Accounts: Download Exchange Online Powershell in Exchange Online Admin Center with Internet Explorer (had to Install IE again first haha), then connect with Powershell
#2Create the Roomlist and Add you Surface Hubs into it
#3: You can now select your Surface Hub as a resource in Teams