Starting a Meeting

I just signed up for Zoom Pro and tried to host a meeting by typing in the participant's email address and he never received the email invitation. I then added him to contacts and clicked INVITE which got sent to him. He clicked accept, and was giving a message saying that he cannot us the link to add friends (he is not a Zoom account holder). In my contacts, he shows as pending and it say awaiting approval. What am I doing wrong here?