You can use the “Force to FBA” switch if you don’t want to turn the products to FBM during the FBA shipments process on Amazon FBA warehouse. Because Amazon may switch your products to inactive due to out of stock in the FBA warehouse.
You can use this switch both from SA UI and bulk import.
Via SA UI:
1- Find your product and click edit.
2- Activate the “Force to FBA” switch.
3- Select the product, send quantity updates and sync the channel.
Via Bulk Import:
1- Select the product and go to “Export>Export Overrides>Custom Overrides”.
2- Export the “Force to FBA” field.
3- Download the file from the “Notifications”.
4- Enter one of the valid values “yes” to enable the “Force to FBA” and “no” to disable the switch.
5- Upload the file into the SA from the top right of the screen.
6- Select the product, send quantity updates and sync the channel.