Option 1: Record and Review
Publish your exams and set them up for Record and Review proctoring. This allows the testing to happen at any time, at the examinee’s convenience. This makes it extremely flexible and easy to implement, and validates the results for that examinee. The examinees webcam and screen are recorded for the duration, and these videos are reviewed within 48 hours by a trained proctor team.
The drawback to this approach is that while you are validating the given examinee, you are not protecting the exam itself. If an examinee took pictures, you would know this happened, but not until your test had found its way to the internet. Therefore, this approach is best suited for medium-stakes exams.