Here’s a contrivance. You could allow anyone to join, but have no read-only categories. People would have to be added to a group to be able to get to the Good Stuff. People would have to know to join a group to see the stuff.
You’d need to think through that, but you could assign lots of people to be group owners who’d be able to add more users.
Or just create a “please invite these people” topic, in a category that only TL2 members can see. If people post in they are TL2 by definition (or set up whatever category permissions you prefer), and staff can edit the request posts to put a 
next to those they invited.
Thanks for the suggestions I’ll have to talk to my partner and see what he thinks.
If anyone happens to think of any other possible solutions I’d be happy to hear them!
I am totally confused with this topic. Ignore me if I am wrong.
Anyway just now I tested invite functionality in my localhost and it is working fine with below criteria.
invite only SiteSettinglogin required SiteSettingNow I am able to send invitation as that new user. Even it is working while both or either one SiteSetting disabled. I can’t understand why it is not working for you. Do you have SSO enabled?
Currently only TL2 users can send invites. So no harm when we welcome friend-of-a-TL2-friend-of-a-TL2-friend-of-a-TL2-friend 
Dunno, the OP will need to confirm if SSO was enabled.
SSO is not enabled nor is login required.
What about enable local logins SiteSetting? It says “Enable local username and password login based accounts. (Note: this must be enabled for invites to work)”
Update: must approve users SiteSetting doing it. While it enabled staffs can send invites. But not normal users (any TL user) can’t.
Isn’t that supposed to be done through invite only AND must approve users?
It’s possible @vinothkannans is right here – must approve users.
Clearly the interaction between these settings is complex and confusing.
@vinothkannans got it sorted out for us it was the must approve users. setting.
So I guess my next question would be is it possibly to add a button in the customize html section that would open up the invite modal?
Okay let me explain when all the invites won’t work for a user.
must approve users setting enabled. (staff are immune to this limitation)Isso foi atualizado algumas vezes desde então. A redação atual é…
Todos os novos usuários devem ser explicitamente convidados por usuários confiáveis ou equipe. O registro público está desativado.
Tenho isso ativado. Onde um usuário existente iria para convidar outra pessoa? Desculpe, não consigo encontrar.
Reduzi o nível de confiança padrão do convidado para 0 para testes. Ainda não estou vendo.
Os “usuários confiáveis” referenciados são usuários que atingiram o Nível de Confiança 2 (NC2) (15 dias retornando ao fórum). Se você já possui uma comunidade ou está tentando criar uma, pode ser uma boa ideia conceder manualmente o NC2 e o NC3 a alguns usuários que você convidar.
(
certifique-se de clicar em “Desbloquear Nível de Confiança” após uma promoção manual para o NC2, para garantir que eles possam conquistar o NC3 mais tarde!)
Olá @shaundefense, você conseguiu fazer isso? Criar um botão separado para exibir o modal de convite?
Existe uma configuração para isso? Quero desativar a capacidade dos usuários de convidar outros, para que apenas a equipe possa fazer isso.
Ative “aprove usuários obrigatoriamente” para que a equipe precise aprovar cada cadastro, defina o limite de taxas de convite para 0 ou desative os logins com nome de usuário/senha locais e exija um provedor de autenticação alternativo.