How do I customize templates that get sent out to users or administrators for Password Expiration Notifier?
Click on “Customize” for any of the specific notifications you want sent to users. If you want to change the administrator template, click on “Configure” and then click the “Edit” button at the top right of the GUI that pops up.
The notifications are customized using HTML. The following KB article has some of the types of customizations you can do: https://www.netwrix.com/kb/1397