The EffectiveUnitPrice indicates the discounted price. The PromotionID indicates whether or not the promotion was applied. Calling the Partner Center APIs to see if promotions were applied to a transaction.Going to the Partner Center billing page.You can check the estimates file or unbilled open-period line items by: These promotions have varying discount amounts and durations. Microsoft supports promotions in new commerce. For more information, see new commerce experiences overview. The new commerce experiences for license-based services include many new capabilities and are available to all Cloud Solution Provider (CSPs).