Solved
Can't add an alternative host!
I have a paid Zoom account. When I go to "add alternative host" it won't let me fill in any address at all. (The box is greyed.) I tried this both from my desktop and the app.
Hi, @maxthegirl
An alternate host is limited to paid user within the same account.
Are there any other paying users besides you in your account?
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.