I doubt this would work for the intent you mean. They’re not adjusting settings in the server section of the ingame settings, they are using a script to adjust all 780 servers at once.

What happened here was somehow the line for thrall decay got altered when they were adjusting the building decay. Probably the result of an extra space or line break or some other sort of fat fingered thing in the file they used.

There’s no popup to be had in what they’re likely using, it is probably command line based without a GUI.

All they really need to do is make setting changes on Monday morning, NOT Friday Afternoon. To which they might be doing according to their last post.