Board Thread:Support Requests - Designing Your Wiki/@comment-36756816-20190115004553/@comment-34804319-20190115140645

Guys, I don't think you're getting me here, I'll explain one more time:

The message that appears to any user that is not an admin, who tries to edit a protected page, cannot be changed by anyone on the site. It doesn't matter if you are a bureaucrat, founder, moderator, or admin, it cannot be changed without requesting it from staff.

Respectfully Gilben, there is no way to "find out how to do that" since it requires editing a portion of Mediawiki that is accessible only to staff.