Licenses for alternative hosts

[DeenaLarsen]

 I really desperately need to add a licensed user for my Pro account. How do I add or pay for a licensed user to be an alternative host? I need the host to start the meeting and to be able to mute people. 

I have a pro account. The account message says that I can purchase more licenses for users on this account. HOWEVER, when I click on that link, it sends me to a main page and there is no place to purchase this additional license.

How do I buy a user license for someone to be an alternative host on my account?

Do I need a business license?
Thanks
Deena Larsen