In our company, we're working with customers who also have their own Jira Atlassian License. So for example, our Jira Space is called company.atlassian.net and our customer is working in the Jira Space with the URL customer.atlassian.net.
My question: do we have to pay for our customers who have access to our Jira Boards via the URL company.atlassian.net, even if they log in with the same login as they're using for customer.atlassian.net?
Tricky to explain my problem... Hope you understand 
Thanks for your help!
Best,
Daira