I had been using Skype for Business as the online call handler for my Mac, but had various problems in online meetings – sometimes not seeing screen shares, sometimes not seeing chat, sometimes others not seeing my screen share.

But when I tried to switch to Lync, it took a while to figure out how to make “Join online meeting” links work – they kept launching Skype. Turns out that it’s simple – go to Lync Preferences > General tab and change the drop-down settings in the Services section (you can click on the image to expand it).