I have a Search Head that has direct customer access and I would like to
prevent systems messages from appearing at the top of the screen on this
search head. Occasionally we have system events like a forwarder that
is mis-configured to send data to a non-existent index and I would like
for this information no to be so prominently displayed at the top of the
screen in bright yellow. Is there a way to remove this from the web UI?
There is, if you provide users with new views. You can either create a new app with modified views, or override the default ones with custom ones. Then you can modify the filter on the "Message" XML module, or remove the module completely from the view XML. You'll have to do this in each view to which the users have access.