What doesn't work is actually Groups which my coworkers use (https://askubuntu.com/questions/573620/how-to-activate-group-chat-in-skype-4-3-in-ubuntu-14-04 http

What doesn't work is actually Groups which my coworkers use (https://askubuntu.com/questions/573620/how-to-activate-group-chat-in-skype-4-3-in-ubuntu-14-04 https://askubuntu.com/questions/573620/how-to-activate-group...). But I will try again because maybe they did it. --edit-- Yep, this now works.