When adding a Magento Product to M2E Pro Listing, you have to assign an appropriate eBay category to it. One of the possible options is to choose a Magento Attribute as a source for the eBay category.
In order to set the eBay category from a custom attribute, follow the next steps:
Step 1. Create a new product attribute in Magento or use an existing one.
Step 2. Enter a valid numeric ID of the eBay category as the Product Attribute value.
For example, you want to set this eBay category for your Product: Home & Garden>Furniture>Chairs (54235). So, you enter its numeric ID “54235” as the Product Attribute value.
You can also use the ID of a particular eBay Store category as the Product Attribute value. To see the category ID list of your eBay Store, navigate to eBay Integration > Accounts > select Account > eBay Store > Categories. Select the category you need from the Category Tree and its ID will be displayed in the Category ID field.
Click the Refresh button on that same page to re-synchronize eBay store categories in case they have been changed on eBay.
Step 3. When configuring the Product category, select the relevant Magento Attribute as a source for the eBay category. Click Confirm to save the changes.
Step 4. Provide the necessary Item Specifics.
eBay categories usually have a default Item Specifics set. But if an eBay category is set to be taken from a Magento Attribute, you have to indicate the Item Specifics manually from scratch, including name and value.
If you correctly enter both the ID of the eBay category and all Item Specifics, then list the Product on eBay, it will be displayed in an appropriate category.