Create portal only customers with a email domain

Question

Hello everyone

is there a way for an external user to be a portal-only customer without an invite but with a specific email domain address? 
we know the option under Customer Access that allow creation of accounts with a specific domain but this option adds the user as a full account and not as "portal-only customer"

this is becoming a problem because we have limited users and we have to keep removing those that we don't need anymore, on the other hand if we uncheck this, we have to manually keep sending invites for those that want to access the portal.
so my question is:

is there a way for a user with a specific domain (like out company domain) to access the portal without creating a new user account?

We would like the people from our company to be able to access the portal but to stay as portal-only customer to not saturate our user list

Thank you very much for any answer

Fabio Perez_4bhfjm · Answer

Hello @Jack Brickey thank you for the response. I've read the article and @David Ricardo Erazo got my problem. It's not about the license but about creating customers as users instead of a "portal-only customer" . I ask if there is a method to use this but to have the customer added as a portal only customer instead of a portal user, because we're getting saturated by users in our project .
Thanks again.

David Ricardo Erazo · Answer

I think the problem with this is that in this case the access will be created as portal USER, what Fabio is asking for is access as portal COSTUMER. It's not license related.

Jack Brickey · Answer

If your customers are receiving licensed access by default please inspect the default user group configuration. default-groups-and-permissions