Conversation inviting

Hi, I’m having trouble with setting a few admins for a conversation on my website. I’d like to create one big conversation for all logined people and allow them to enter it to chat. I’ve heard you often help people with this plugin, and I’d even like to buy it, but this function is too important for me, and I don’t see it available even in premium version

Hope you will help me, I’d really appreciate that,

Aiden