In your integrator.io account, navigate to the Magento 2 - NetSuite Integration App tile in the dashboard. Hover over the Integration App tile and click the gear icon to open the "Settings" page.
In the Order section, click Advanced Settings as shown to view the 'Map Ship Methods' setting.
The section expands to display the settings for both Magento 2 and NetSuite ship methods.
In the Magento 2 Ship Method section, click on the row below the label and enter the desired method.
Similarly, select a value in the NetSuite Ship Method drop down list. If no data is yet visible, click the 'Refresh' icon to fetch the latest list from NetSuite.
After creating the mappings, Save the settings.
Fail if Unique Match Not Found:
When this option is selected, the flow fails if a match is not found in NetSuite for the corresponding values in Magento 2. When you deselect the checkbox, new options are displayed in a list enabling you to provide a default value for the NetSuite ship method if no match is available in NetSuite.