Monitor invitees

I would like to know how I can monitor our invitees that we invite via outlook with zoom link. The invitees are in a distribution list. Every quarter we speak to these invitees so we would not like to let them register. Sometimes a person moves on and and will be replaced but the group remains stable. During the zoom call I constantly need to monitor that not an unknown person enters the meeting. Because everyone with the link can enter the meeting. Would there be another solution that I know when someone who should not enter the meeting does that?