Customer merge

There is requirement from the user end that they need to merge the Customer Organization level & Customer Account level as there are many duplicate records created at both the level.

We checked in the Oracle documents, and we are able to find out the setups on how to merge duplicate Customer Organization. However, for the other requirement regarding merging of Customer Account we are not able to find any document for the same.

Could you please let us know on how we can be able to merge duplicate Customer account if any.