RD CAL Usage report automation script

Hi,

I'm looking for a script which I can schedule to run every month to generate RD CAL usage along with list of users, Expirydate, RD CAL Type, Available licenses and issued licenses in a single csv file similar to how we get it when manually generated. I tried modifying the PS script available here https://skilledteam.wordpress.com/2016/05/31/windows-2012r2-rds-cal-reporting-script/ , because of my limited knowledge, I could not achieve what i wanted. Can someone pls help me