ProctorU online live proctoring is one of the companies that SmarterProctoring Partners with to provide flexible proctoring solutions.
If you are looking for steps on how to schedule your exam with ProctorU through SmarterProctoring please review this article:
Scheduling an Online Proctoring Session - ProctorU
If you have any trouble or questions while scheduling, rescheduling or cancelling your exam with ProctorU, the SmarterProctoring support desk is available 24/7 to assist you via chat or email. You may use the 
button located at the bottom of the SmarterProctoring section of your student dashboard to connect our support team.
We strongly recommend that you test your computer well in advance of your ProctorU exam to make sure that your system meets their minimum requirements. Please Visit: https://test-it-out.proctoru.com/