The Excel formula `I_EOL_ACTADS_POSTALCODE` retrieves the postal code of the address of an account from Exact Online. Parameters: - `divisionCode`: division code. - `accountCode`: account code. - `addressType`: address type (one of "VIS", "POS", "INV" or "DEL" for "visit", "purchase", "sales invoice" or "deleted"). - `useDefault`: whether to use the default address. Returns: postal code of the address of the account.