No, there is no way to configure the output from reports. They are sent as an HTML file.
This request is being tracked as Enhancement Request ID 273600.
An Enhancement Request has been created to change this existing product functionality .
Product Management will evaluate the request and this feature may become available in a future release of the product.
There are no guarantees that this specific enhancement request will be implemented in a future release. For more information regarding our Enhancement Request policy, refer to our Global Support Guide on the Support Portal at: https://support.oneidentity.com/essentials/support-guide/