If using Edge, this is not a problem as the NPAPI version will still load the desktop app.

My experience is that the same link randomly creates two different renderings of the landing page where one is using NPAPI not supported in Chrome, while the other is not. The one that does not work in Chrome, gives NPAPI error in the Console (as expected from Chrome), but the one that is working There are clearly some difference in how the page are rendered. Organisation and both opened in the same Chrome browser.

These dumps are from meetings created within my I have dumped the content of the landing web page after clicking the link to show the difference between the scripts when the desktop app opens and when the Lync Web App starts.

It is preferred to open the desktop app, but too often it is not possible as I am forced to use the Lync Web App plugin. That sometimes open the desktop app, and other times the Lync Web App. I'm experiencing that when I click on a Skype for Business link in an Outlook meeting, sometimes it will open the local desktop Skype for Business application and other times the Lync Web App plugin.

Open skype in browser