Update only existing Stock Items

Hello,

I’m attempting to update pricing on existing stock items only. We have discrepancies in our Inventory IDs and instead of creating a bunch of duplicates the company only wants to update the stock items where a match is found. Is this possible using import scenarios? I’m having trouble finding documentation that supports this.

Edit: Furthermore, I would love to be able to identify the records which are not found to be corrected. So maybe that is an alternative avenue. 

Thank you in advance