The Report Catalog contains a number of predefined reports that cover common scenarios, available in bar chart, trend chart, and tabular formats. You can copy any predefined report to apply your own filters to create a custom report, and share your reports with other administrators. See
Using the Report Catalog.
Use Report Builder to create multi-level, flexible reports that allow you to analyze information from different perspectives and gain insight into your organization's email message trends. If a high-level summary shows areas of potential concern, you can drill down to find more details. See
Using the Report Builder.