Go to https://lehigh.zoom.us and Sign In. Log in with your Lehigh computer account credentials.
From your personal profile navigation in the left-sidebar, click Meetings.
On the Meetings page, either Schedule a New Meeting or click Upcoming Meetings and click the upcoming meeting title to access the meeting settings.
On the Meeting settings page, scroll down to Meeting Options and make sure Only authenticated users can join is checked. This will require all participants to log in with their Zoom account before being able to access your meeting.