Current documentation Inventory marking documentation (Inventory marking - Supply Chain Management | Dynamics 365 | Microsoft Learn) indicates the functionality is default "on" as long as the system is running Supply Chain Management 10.0.36 or later. However, it does not mention costing methodologies disabling the functionality (see Moving average - Supply Chain Management | Dynamics 365 | Microsoft Learn). This should be cross-referenced in the Inventory marking documentation to allow consideration of this limitation.