Hey, @timlonggr –
So you have two Webinar add-ons at the nominal 500 attended level, and each one is assigned to a different user. Now, you want one of those users to have a larger Webinar license.
I thought I had an answer for you, but looks like what I thought was wrong. I can’t find a definitive Zoom Support article on the process, and the Zoom Events license I have just has a check mark next to it. I’ll continue looking to see if I find something.
In the meantime, try having your Admin go to Admin / User Management / Users, and click Edit next to the user you want to upgrade. see if there is something there next to the signed Webinar add-on you can click to upgrade one license to the level you need.