If you would like to resend invitation emails to all pending confirmation members, click Resend invitations
If you only want to re-invite a certain member, hover mouse over that member's row and click kebab menu(⋮) on the right, click Resend invitation
Note: If one invitation was sent to the wrong email address, hover mouse over that member's row and click kebab menu(⋮) on the right, click Revoke invitation