Still trying to reach previous earnings dates for backtesting purposes. I see under the Data tab on your header bar, there is Fundamentals data (for the United States) that is provided by Morningstar. On that page, I see an EarningReports group, with FileDate as an option. How do I reference this???? Does it come in with

AddSecurity(SecurityType.Equity, symbol, Resolution.Daily);

If so, how do I reference it? Securities["symbol"].EarningReport.FileDate