Automate a Cleansing Case from External List Management

Hi All,

I am not familiar with External List management I really appreciate your input and advice.

There is a requirement where when data upload are done via External List Management, and when a duplicate is detected, a cleansing case is to me automatically created.

Do you have any idea as to how this can be achieved? Or the best practice for this to be done?

Thank you.

Regards,

Amanda