The Office 365 audit log is a great source of information about what happens inside a Office 365 tenant. Searching the audit log takes practice, but it turns up lots of insight. This article covers how to use the ObjectIds and FreeText parameters to find information about what happens to an object.
https://office365itpros.com/2020/10/08/search-office-365-audit-log-object-specific-events/
