Here's how to do it
Click on New event.
A window for the invitation will appear.

Uncheck Request responses. Those you invite will have the opportunity to add the meeting to their calendar, but no reply will be sent back to you.
Continue to fill in the event (meeting) invitation as described here.
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Book a Zoom meeting
Students and employees can book a Zoom meeting with UiO Helpdesk. Available hours are Tuesday to Thursday between 11:00 and 13:00.
Book a video call