A unique license key is required for one internet domain name. Therefore, the license is not only on a per server basis (server means chat server, not physical server), but also on a per domain basis.

If multiple domains need to share one license on one chat server, it costs extra $100 setup fee to add each domain name to the access list from the second domain name, and the pre-condition is the multiple domain names belong to the same company. Otherwise an extra license is required. On the other hand, if multiple domain names direct to the same website, no problem TOPCMM can add them for you free of extra charge.

It's okay for the customer to change the domain name someday, just let TOPCMM know the new domain via formal email and we'll arrange the changes. And once the binding between the new domain and the chat license is accomplished, the old domain won't be able to use the chat license any more.