This feature is released now, please try it out and provide feedback. For details, please see the documentation below:
As we announced at Microsoft Ignite 2019 this morning, we are excited to confirm that Multi-window capabilities are coming to Microsoft Teams, and will start rolling out to the public ring early next year!
Alex & the Teams teamAdin commented
Can't roll this out unless users are able to chat while using the rest of the application. The collaboration features are great, but extremely frustrating when you need to exit a session just to respond to an IM.
This request has been declined by the feature team.
Private channels may help with items such as this request once they are released. The Private channel topic is tracked at http://microsoftteams.uservoice.com/forums/555103/suggestions/16911079
Please note the handling of “Guest Accounts” is a separate ask and can be found at: https://microsoftteams.uservoice.com/forums/555103-public/suggestions/16911109-guest-access
The request about “Guest Access at the Channel” level is being tracked by this request: https://microsoftteams.uservoice.com/forums/555103-public/suggestions/31374577-guest-access-should-be-implemented-at-the-channel
Thank you all for the feedback.
Yes, channels should be opt-in and owners should be able to assign users to channels individually.