Add interaction capacity to a D365 Marketing environment with the Tier 1 Interactions Add On Pack. It is a cloud software entitlement for Dynamics 365 marketing usage, intended where the base marketing deployment requires an additional interactions allocation. The Tier 1 designation identifies the capacity-pack level being ordered and should be matched to the organization’s existing D365 Marketing subscription configuration. Microsoft part number 2D0770EBA5B7 represents the D365 Marketing Interactions Add On Pack: Tier 1 entitlement. It is an add-on rather than a standalone marketing application, so it fits an environment already using the applicable D365 Marketing service. The entitlement extends interaction capacity within that service instead of adding end-user hardware, local media, or a separate server component. Use this pack when the requirement is specifically for the Tier 1 interaction add-on level. The product designation matters because interaction capacity packs are separate from the underlying marketing service and may be ordered at different capacity levels. Administrators should align the entitlement with the tenant and service configuration where the additional interaction capacity will be applied. This item is delivered as cloud software rather than a physical product.