On the tabbed page Request licenses online, you can call the online form (on this compare Online-Registrierung und Lizenzierung).

Via online form you can register and order licenses.

Online registration and licensing

When requesting licenses, pay attention to use mac addresses, not system IDs.

You can find the mac addresses either under License administration -> General

or under

Saving configuration... -> json file.

Save the configuration in as json file. Open it in Notepad. The first entry under "hostids" shows the mac address of the server. In this way you can detect it remotely. It is required for issuing the license.