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

Use Teams admin center to identify a user's teams membership

All teams are in essence groups, and a user's group membership can easily be identified in Azure Active Directory. But, distinguishing Teams groups from other groups can be time-consuming and is not as easy as it sounds.
Now the task has become a lot easier for Teams admins. The roadmap item 87969 is now announced in the Admin center as rolling out soon. This will make it all the easier for admins to assist and manage users memberships.