Custom field names are not able to be exported by default into new projects exported from PPM in the new driver. However, you can add them to the project and then each time you export the project from PPM, the custom field names will show in the column names. To add them, please see the steps below. (Note, this will need to be done for each project)
1. Navigate to the Organizer section in MSP
2. Click on the Fields tab
3. Move the custom names found in the Global.MPT section to the project section by highlighting all the fields under Global.MPT and clicking the Copy button
4. You'll see the column names update to the custom field names
5. Save the project back to PPM
When the project is reexported to MSP, the column headers will then retain the custom field names.