Microsoft Teams – I know it is odd ;)

  • Add this line to /etc/apt/sources.list to enable Microsoft Teams repository:
deb [arch=amd64] https://packages.microsoft.com/repos/ms-teams/ stable main

Remember to change [arch=amd64] to your CPU architecture if you're not using AMD64.

  • Run sudo apt update
  • Run sudo apt install teams

Regarding your note

as far as I know 1.4 is out, with many new features

I can see two different packages: teams (v 1.3) and teams-insiders (v 1.4). Is it possible that this is what you meant?

$ apt search teams

# ...

teams/stable 1.3.00.30857 amd64
  Microsoft Teams for Linux is your chat-centered workspace in Office 365.

teams-insiders/stable 1.4.00.4855 amd64
  Microsoft Teams for Linux is your chat-centered workspace in Office 365.