Learn how GroupDocs.Conversion for .NET denies external resources by default, and how to allow trusted resources by absolute URI prefix, decide per resource with a handler, migrate whitelist entries from earlier versions, run scripts and handle XBRL and 3D dependencies....XLS, XLSX, XLSM, XLSB, XLT, XLTX, XLTM, XLAM, ODS, OTS, FODS...