XF 1.5 I need to display one thread/post to everyone who logged in and read.

[xfactormaster]

I need to display one thread/post to everyone who logged in and read and if they read only access the forum. If not, it should display, I observerd this on digitalpoint forum, I need same one.
I want to read one post to read the users. how to do it?

 

[Paul B]

That would require custom development or a third party add-on, if one exists.