Authorization Audit Summary

Hey guys,

So I've been unable to determine if this is possible in googling on my own, I’m hoping you can provide some insight. My company is undergoing a third party audit for public record, and one of the auditor questions I’ve been tasked to respond to is produce a list authorizations per user in the organization's Dynamics CRM Online instance. Because of the structure of business units, and teams, etc, I’m finding it difficult to respond efficiently. Do you know of or is there a way to report on user authorization in a batch and summary way with CRM Online?

Thank you very much!