Microsoft Teams Real Time Presence (February 2020)
Stay focused throughout the day with Microsoft Teams. Whether you are free for a quick chat or presenting in a meeting, real time presence increases the accuracy of your status so others know when to reach out.

Legal Hold for Teams Private Channels Messages (February 2020)
Legal Hold for Teams will now support Private Channel Messages. There is no action required to enable Legal Hold for Teams Private Channels. To learn more about how to apply a legal hold for private channels, see this article:

Microsoft Teams – Channel Cross Posting (March 2020)
Channel cross posting now supports editing a message after it has been posted. Additionally, you can add or remove channels to reach a wider audience or have a focused conversation.