I have a number of servers running NDPS - all of which use the same
broker. All of a sudden when users print to printers attached to any of
these servers, they get the print notification popup window opening. This
happens for any event for the printer, eg out of paper, off line etc.

Can anyone point me in the right direction where to look, as noone is
admitting they have made any changes. The users do not want these popup
messages but i am unsure where to globally turn them off.