After viewing the availability status of a user, it will be easier to initiate skype call with him/her. So watch this video to learn how you can call a user with Skype for Business Desktop client.  

We, at Foetron, are a team of Cloud Evangelists who sell Office 365, provide migration & deployment resources and train organizations on Office 365, Teams, Project, Visio, Yammer, Delve, Planner, Booking and Office productivity tools. We are working to empower organization to take the journey of digital transformation.