Resource Access Management (RAM) is an Alibaba Cloud service that enables you to manage user identities and resource permissions. If multiple users or applications of your enterprise need to access Cloud Architect Design Tool (CADT), you can use RAM to centrally manage permissions and grant access permissions to users and applications based on your business requirements. Before you use RAM to manage the permissions on Alibaba Cloud services, we recommend that you learn about the RAM features that can work with Alibaba Cloud services. This helps you better configure access control to meet your business requirements. This topic describes the RAM features that are supported by CADT and how these features work with CADT.