Can someone please explain why are CAL licences important ? Or better yet, in which cases are important? Especially in a Windows Server 2012 R2 environment.
Client Access License (CAL) Explanation
I don't think there's enough space in this post to answer this question alone but luckily there is a blog that answers the majority of the questions about CALs you'll need:
**if the post above has answered the question, please mark the topic as solved.