Problem Definition

Currently, when you invite a user with a verified domain, a pop-up below is shown:

You can either approve the domain:

Or you can set the domain to not be suggested anymore:

The approval of the domain causes the users with the domain to be able to self sign up to the site (without admin approval).

Suggested Solution

Explain more thoroughly in the pop-up about the consequence in approving the domain (such as being able to self sign up). Or remove this pop-up entirely.
It would be very useful to disable this pop-up in scenario when Site access Approved domains is set to ‘Don't approve any domain’

Workaround

None