Hi
I was not able to find any API for collect IM reporting data. You can generate reports to track and measure activities and usage of the Cisco WebEx Connect application and Cisco Jabber application. You can only run reports for the previous 13 months. The Cisco WebEx Messenger Organization Administrator can generate the following reports:
You can run only one report at a time. A progress indicator shows the status of the report generation. A Completed status indicates that your report was successfully generated. You can directly view the report or save it to your computer as a CSV file. Reports are saved for 7 days from the date the report is generated.
Refernce - Reports
Thanks and Regards,
Geevarghese