SSRS Report Server Database Locations

Question

I've recently inherited management of a large number of SSRS environments. I'm attempting to generate a list of all the database server/instance/names for each of the SSRS databases (not the data sources).

These are stored in the rsreportserver.config files, but they are encrypted and I'm not sure how to extract them.

Is there an easy way to get this information from a large number of instances?

If there is a way to do it via command line, I can easily push the command to all servers and collect the output.