For Integration from Salesforce to Quickbooks

• If multicurrency is enabled in Salesforce and QuickBooks then we need to make some changes in DBSync settings and mappings to achieve seamless integration with MultiCurrency.

...

• Add the same mapping to following states as well, If you are using these states in Integration
  • OpportunityToSalesOrder
  • OpportunityToSalesReceipt
  • OpportunityToEstimate
  • OpportunityToCreditMemo
  • RecurringInvoices
  • RecurringEstimate
  • RecurringSalesOrder
  • RecurringSalesReceipt
  • RecurringCreditMemo

For Integration

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from Quickbooks to Salesforce