The foundational step in any Entra ID group-driven access model is establishing the directory relationship itself: adding Microsoft Entra ID as an identity provider within the Cloud Identity Engine and explicitly configuring the group mappings that correspond to each project ensures Prisma Access has a live, synchronized view of which users belong to which project-specific groups as those memberships change over time - without this step, no downstream policy can reference accurate, current group membership at all, which makes option D a clearly necessary configuration. Once group membership is flowing correctly from Entra ID through the Cloud Identity Engine, the second half of the requirement is translating that group membership into actual differentiated network access to project-specific resources; this is accomplished by associating each synchronized group with the corresponding project ' s IP address pool or resource scope within Prisma Access ' s access configuration, so that a user ' s dynamically evaluated group membership determines which project resources their Security policy grants them reachability to, which is the mechanism described in option A. Creating a custom application per project in Entra ID for SSO (option B) addresses application-level single sign-on integration, not the network-layer, group-driven access-to-resources requirement the question is specifically asking about. An authentication sequence prioritizing Cloud Identity Engine authentication for certain groups (option C) affects the order in which authentication sources are attempted during login, not whether or how project-specific network access is dynamically granted based on group membership.
Reference:Cloud Identity Engine - Configure Microsoft Entra ID as an IdP and Group Mappings; Prisma Access Group-Based Resource Access.