Import / Export of Archived products
Go to Magento admin panel - Stores - ATTRIBUTES - Product - Add new Attribute
Default Label = SF Archived
Catalog Input Type for Store Owner - Yes/No
Attribute Code = SF_Archived
Default Value = No
Go to Magento admin panel - Stores - ATTRIBUTES - Attribute Set
Add new Attribute to your Attribute Set
Ask SF Support to provide csv file with Archived products
Go to Magento admin panel - Catalog - Products
Edit All Archived product and set SF Archived value to Yes
Go to Magento admin panel - System - Export
Select Entity Type - Products
Set 'Yes' filter by SF_Archived field
Exclude all fields
click Continue
Go to Magento admin panel - System - Import
Select entity Type - Products
Import Behavior = Replace
Select saved file and complete import