So unfortunately, there’s not a simple way to do this. The closest I’ve come across is basically run a report of all current enrollments, run a report of all users (or in your case if Power BI has all the users already, just compare there) and do a compare for folks missing from the enrollment report. If doing manually I just do a unique value pull on the enrollment doc and then do a vlookup on the total user list to find users missing.
Now, the obvious issue of this is the manual and the largeness of the enrolled report. Over time that gets large….Since you are in the PowerBI world, you could setup some type of data source to do the compare, and just have the report be users enrolled in the past x days so you are only getting new enrolled to remove form the list of folks who are not enrolled, not simple but doable if really needed.
There is an API call that looks for users that are able to be enrolled in a specific course, they are those who are not currently enrolled and are eligible too, I know not exactly what you are asking for but could be a more useful technique.
