With the MSP new driver, assignment level attribute mappings created under Administration - MSP Field Mappings do not work as expected. For example, creating a field mapping to map assignment Actuals and ETCs to Number5 and Number6, always shows a zero amount in MSP.
Assignment level attributes export as resource attributes in the XML. For this reason, the values will only display on the Resource Usage view. Adding the columns to the Resource Usage view will display the same value as PPM.