Step-By-Step:
Step 1: Click on the Gear Wheel (Settings Icon) in the top right corner of Jonas Synergy.
Step 2: Click on “Course User Info” from the left hand menu.
Step 3: In the course user info window, select the user you want to inactivate by clicking on edit.
Step 4: Click on the user status option and select "Inactive" from the drop down menu and click submit to save the changes.
Important to note - this will not immediately log out a user's active session instead it will prevent their next login attempt.