The validate-account-code-request/response message is used by Unimarket to request an external system to validate the Account Code (FOPAL, ledger) information the buyer has entered on their requisition. The Account Code information is passed to the external system so that checks can be made around things such as the user's ability to purchase on that account, the account combination being used and if there is budget (among others). The external system responds back to Unimarket with a Yes, No, or Warning. This can then be used to stop the buyer from purchasing (if No) and/or display a warning or other related information such as the available budget (any message the external system provides).
Technical details relating to the integration can be found below: