I haven't found any similar case to mine: we have a restricted help center, so only logged on users can access it. I would like to enable registration for new users - but, only to allowed domains.
The whitelist and blacklist options seem to control only submission of tickets, not the signup itself.
I want to add the widget to our website (which only authenticated users on our website can access) - and allow the users to use the widget to search the knowledge base and to submit tickets - but, only if it's done in the widget. I don't want any user to sign up as this will allow them to access our help center and knowledge base.
From all I've found I can't figure out how to do this.