[neilsimp1]

We use Skype for Business at my work. I'm not really sure what the difference is between that and regular Skype. I know Skype for Business is just a re-skinned MS Lync, which in turn is just a re-skinned MS Communicator from back in the day. It's a pretty terrible chat client but it's what everyone is used to using here.

[tallanvor]

Skype for Business is very different from Skype. The business version, at least for online customers is also being deprecated in favor of Teams. --No clue if/when that will happen if you use the on-premises version.