Litespeed Encryption: multiple instances.

Hello I have a 100 or so instances that I need to create new backup jobs for and we have a requirement to use encryption. I know how to do it via GUI but for obvious reasons I was hoping to now have to run the GUI 100 times. When I tried to use the script against different instances the key is stored as n'*****' so that obviously doesnt work on different instances. Any ideas what I need to do ?