The MailDetail REST URI is for internal use only. Request syntax checking is performed but no data will be returned by this report. This report name might appear in the reporting.svc service description document but should not be called.
Applies to: Office 365
This report is for internal use only and should not be requested. This report name appears in the reporting.svc service description document but it should not be called.
As of July 2013, this report has been removed, and for most organizations will not be available.