Map the commercial records deliberately
Identify how a CRM customer matches a Xero contact and how invoice references remain traceable between systems. Agree which invoices should be exchanged, when they are ready and which values need validation. Tax treatment, currencies and account mappings require finance review. If one system remains authoritative for corrections, make that rule visible to staff so an edit in the other system does not create a competing version.
Give exceptions a route back to the team
A useful integration plan covers partial payments, credit notes, duplicate contacts and rejected updates as well as the ordinary invoice. Decide what status returns to CRM and how staff distinguish an unpaid invoice from a failed exchange. Keep a record of the transaction identifiers needed for reconciliation. Confirm connector availability, supported record types, exchange direction and implementation work against your Xero account and the proposed Pixie CRM configuration.