Hi @JanineD1 thank you for your post here on the Zoom Community! Is it possible that your manager is just not signed into his Zoom client? If he can open the client before a meeting and make sure to sign in. I would have him double check this because it sounds like he is just clicking on the link for the meeting, maybe entering his name to join but he's coming in as a guest and Zoom doesn't recognize that he is actually supposed to be the host. If he signs into the client, when he clicks the meeting link he will join with his account and Zoom will recognize him as the host.
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