Hi, I'm also trying to addon a domain. The error I get, like above is that I cannot go above my 0/0 limit. The helpful hint: "This feature must be enabled for your account before you can use it" doesn't help me find out how I can enable this feature. Do I understand correctly that I have to put in a request (i.e. this) to enable addons? Could you help please? Username: partisan Domain: partisans.heliohost.org Thanks.