You are able to update products Syscom with Stock Sync. Just choose on Syscom template after choosing to update existing products in your store. 

1. Go to Setup New Feed > Choose Update existing products.

2. Choose or search for Syscom template.

3. You need to fill up the API Key from your Syscom profile. 

4. Click Next to the field mapping section.

These are the available fields that can be updated with Stock Sync. 

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