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The Meeting Option: Only Authenticated users can join, will require participants to sign in first before they can join your Zoom session.

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It is also useful if you need to Pre-Assign for Breakout Room, as it will require participants to sign in with their NUS Friendly email addressZoom account.

What if I have external non-NUS participants?
If let's say you are now expecting an external guest and need to change the option.
You can add Authentication Exception using the external guest email address.

Pre-requisites: For Generate Automatically meeting ID. 

1. Go to https://nus-sg.zoom.us/meeting?type=upcoming
2. Click on the Meeting Topic.
3. Click on "Edit this Meeting" button.
4. Under Security, Uncheck the box "Only Authenticated users can join" if you have external guests joining and you do not require participants to sign in.Check the box "Only Authenticated users can join" if you want to restrict it. There is the option of:
5. NUS Zoom Accounts
Any Zoom Accounts
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6. Click Save.
7. Require authentication to join, click Add Authentication Exception.
   Add Full Name and Email Address.
   Add Participants if there are more guests.
   Click Save once done.
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8. Verify the Meeting options again.
9. If the meeting was scheduled in LumiNUS, go to to LumiNUS Conferencing page and Sync Meeting from Zoom.
   
   
   
   Note: The change will be effective as long as nobody has joined the session yet.

Additional Guides:
How to Sign In to my NUS Zoom Account?
Pre-assign Breakout Room
Add authentication exceptions