Ok Doug, I admit I never used Skype for business but I installed
Office 2013 and so here I am to report what I found.
At first I checked on history of Windows update since I
remembered something that I installed in the automatic updates but
I did not manage to recall it well. So I opened C:\Program
files\Microsoft Office\Office15, and found the file Lync.exe.
Launching this file it appeared Skype for business as the window
title, and in order to be sure of the correct version, I went to
"Show menu button", then question mark submenu, about Skype for
business, and figured out that yeah it was Skype for business
2015. I hope that it's useful.
