This article provides information to setup scheduled reports for SonicWall Email Security appliance/software.
To create a scheduled report login into the ES appliance as Admin.

The report will be generated on the schedule selected and sent to the designated recipient(s).
NOTE: If the navigation or the screenshot looks different from the one mentioned above , you may be in an older firmware version and would require a firmware upgrade. Please refer the link below to upgrade the firmware to latest version.
https://www.sonicwall.com/en-us/support/knowledge-base/170504270079039