Of the two items in this request, #1 is complete and available.
- is still in the works.
This is part of the convergence roadmap – https://skypeandteams.blob.core.windows.net/artefacts/Skype%20for%20Business%20to%20Teams%20Capabilities%20Roadmap.pdf
As more details become available for item #2 I will share them with you.
-WarrenPaul McConnell commented
Any tool that doesn't allow you to add team members that are not part of your organization is doomed.
This must be version 2.0. Maybe by 3.0 we'll have that necessary functionality.