Establishes a one-year Dynamics 365 Commerce subscription term at the Tier 3, Band 4 level. Microsoft part number 427F1F917-1Y identifies the annual e-commerce service entitlement for an organization operating a Dynamics 365 Commerce environment. It is a cloud-service subscription, not a physical appliance, network component, server product, or perpetual software license. Dynamics 365 Commerce supports digital sales channels connected to a commerce platform. This subscription is relevant where an online storefront or related e-commerce operation requires the stated Commerce tier and band designation for a full annual term. The Tier 3 and Band 4 identifiers matter because Commerce subscriptions are differentiated by their service classification; they should match the organization’s assigned Commerce subscription requirements. This specific subscription is distinguished within the Commerce range by three fixed attributes: Tier 3 designation, Band 4 designation, and a one-year duration. Those details identify the service level represented by this ordering code without implying user counts, transaction volumes, storefront counts, support coverage, or additional application rights. Select it when the required Commerce subscription is explicitly specified as Tier 3 Band 4 with an annual term.