Is it possible to export invoices from Datamolino to a Xero Ledgers (Xero Cashbook) client?

You can export documents from Datamolino to Xero Ledgers/Xero Cashbook account but only as 'Bank Transactions'. For exporting the documents as 'Bills (Invoices)' or 'Expense Claims', you need to have a full Xero subscription.