Connex is a third-party application that syncs orders between ShipStation and Quickbooks Desktop. Orders can be pulled from ShipStation into Quickbooks Desktop and pushed from Quickbooks Desktop into ShipStation. This integration's supported versions include QuickBooks Pro, Premier, Enterprise, QuickBooks POS versions 10 and higher, Wholesale, and Manufacturing. Please note they must be running 2007 or higher.
Head to your Account Settings (the gear icon in the upper right).
Next, select Account and then API Settings from the left sidebar.
Once there, either copy your existing API Key and secret or Generate API Keys.
In a new window or tab, log into Connex with your Intuit account.
Click My Connections at the top and choose ShipStation.
Copy and Paste your API Key and API Secret from ShipStation into the corresponding fields.
Leave the URL as http://www.shipstation.com.
Click Submit to finish.
You can view a full video explaining the integration process here.
Additionally, Connex allows you to create an order in QuickBooks, ship it through ShipStation, then send back shipping details to QuickBooks. You must enable the shipping fields in QuickBooks and the setting in Connex. Connex supports updating sales orders or invoices. Learn how here.
If you continue to have issues setting up your integration between Connex and ShipStation, please reach out to the Connex team at firstname.lastname@example.org.