To schedule an Online Video Session, go to My Calendar. You will see a Schedule Session button at the top of the page.
A modal window will then appear asking you to choose Online or In-Person Session, participants for the session (you can have as many as two other participants in a session), Session Type, and date/time.
Click "Save" to add the session to your calendar.
Your client will then receive a notification notifying them of their upcoming appointment date/time.