If you can't find the file, try looking in the Downloads folder from the Finder. Note: This app is not available through the App Store on your Mac.
If your Mac is running an earlier macOS, go to to see if you can upgrade to OS X El Capitan (version 10.11). To check the macOS version, choose About This Mac from the Apple menu. Skype for Business app is only supported on OS X El Capitan (version 10.11) or later OS X. Columbia Business Schools implementation of Microsoft Skype for Business is an enterprise-ready, unified communications platform, intended as a community-building tool.
You will not be installing an app on your computer. Use the web version of Skype for Business through a browser if you are invited to a meeting. There are two ways to connect to a meeting: Join a meeting through a browser The court uses the app Skype for Business for video appearances, conferences, and other kinds of virtual meetings.