I set up DoDBanner when logging in by putting the following in Web.conf.
It was displayed in Splunk 9.2.1, but it was no longer displayed in Splunk 9.2.2.
$SPLUNK_HOME$\etc\system\local\web.conf
[settings]
login_content = <script>function DoDBanner() {alert("Hello World");}DoDBanner();</script>
Is DoDBanner no longer supported from a certain version?