Join Teams work meetings from Microsoft Teams (free) and vice versa

Microsoft Teams (Free) users can currently join Teams for work (or school) meetings only as guests, which requires them to use a browser and results in a sub-optimal experience. The new feature rolling out will allow these users to join Teams for work (or school) meetings in one click, without being redirected to the browser or asked to fill in their name/surname. They will also be able to continue collaborating with the meeting organizer and other participants via meeting chat after the meeting.  The feature will work in the opposite way as well, so Teams for work (or school) will just as easily be able to join meetings hosted by a Teams Free user with one click. This is associated with Roadmap ID: 167326

Better lobby control in Microsoft Teams

There is a new lobby setting coming this spring, that will guarantee only invited users are allowed to bypass the lobby. If an invited user should forward an invitation, the user who gets the forwarded invitation will have to wait in the lobby even if the original invite allowed the original user to join directly.

Users can find this option on the meeting option page of a meeting. 

This feature was announced some time back, but the release have been slightly delayed. According to the Admin Message center, we should expect this feature soon.