@ktinnerman If you are trying to add users to your account, you can invite their email from the User Management -> Users tab.
https://support.zoom.us/hc/en-us/articles/201363183-Managing-users
If you are trying to add them as an alternative host, those users would need to be provided a license once they join your account.
If they just need to join the meeting, you can provide them the meeting join URL and password information. You can have the meeting set for users to join before host/join anytime. However, I do strongly suggest you start the meeting and pass host controls if necessary.
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