I’ve read that I can use Skype for Business from my mobile device as well as from my laptop. How do I set this up?

denuvem

If you have an Office 365 plan that includes Skype for Business, you can utilize Skype for Business on your iPhone/iPad, Windows Phone, or Android device.  You simply need to download the appropriate app and sign in.

Microsoft provides an overview of the apps, instructions for downloading, and more.