> ## Documentation Index > Fetch the complete documentation index at: https://docs.cloudify.biz/llms.txt > Use this file to discover all available pages before exploring further. # Customer Sync Settings ## Setting Up Customer Sync Preferences ### Customer Search Field Define how customer data is synchronized between Shopify and Xero. Choose a unique field, like email or VAT number, to prevent duplicates. A new customer is created only when the customer is not found in Xero by the defined search parameter. Image ### Customer Default Mappings Set default **values** for Currency, Branding theme Invoice due date, Sales account, Invoice due date and Sales default amounts. These default values apply when new customers are created in Xero. Image ### How should customer data fields be mapped? Customize the data transfer from Shopify to Xero to ensure accurate synchronization when a new customer is being created in Xero from Shopify. Some fields are mapped by default. Click "**Create new Shopify field"** if you want to add any new mapping fields to the window.  Image