If you are already selling on Amazon and want to manage your existing Amazon inventory based on Magento data, you may enable the 'Import 3rd Party Listings' option.
The imported 3rd Party Items can be found under Amazon > Listings > 3rd Party. You can match Items with Magento Products and move them to M2E Pro for the subsequent management. Please refer to this article for the details.
If there are Variational Items (parent/child relationship) in your Amazon Inventory, only Child Products will be imported into 3rd Party Listing.
It can take up to 24 hours to import all existing 3rd party listings, depending on the size of your Channel inventory
During the initial importing, the 3rd Party Items can be mapped to Magento Products automatically based on the SKU, ASIN/ISBN, Title values. To activate this feature, you need to enable the '
Product Mapping' option and select a relevant Magento Attribute. Please read about Mapping Attributes below.