Hi,
I have able to export single CSV file through an RD.
But, according to the requirement, we need to export CSV with multiple tables, please do let me know if we have any OOTB options available in Pega to do so.
@SaiHarshithR4287 OOTB Report Viewer functionality is detailed on our documentation server here.
Please see previous forum questions submitted for workarounds to export as CSV, such as Export to CSV Option for Reports and Exporting report definition data to CSV file
You may also want to check out the documentation Activities for integrating cases with Excel documents