Select the Integration Service that is used to run the session.
Open the custom properties tab and add XMLWarnDupRows in the Name tab.
Add NO in the value for XMLWarnDupRows.
Note Setting XMLWarnDupRows as NO is valid only when running a session that sends multiple records in a single SOAP request. In other cases, do not set XMLWarnDupRows as NO because then even the valid row rejections will not be displayed.