IAM4NFDI is entering the Ramp-Up phase to transform the established authentication and authorization infrastructure (NFDI-AAI) into an operational and sustainable Basic Service for the National Research Data Infrastructure. The core objective is to create the necessary environment for seamless, secure and federated access to digital resources across all NFDI consortia. Building upon the successful integration of most consortia in the previous phase, this project will focus on scaling the service, improving the user experience and establishing a long-term governance and funding model to ensure sustainability beyond the end of the project. Core activities include incubator projects for integrating complex services, adapting to new technical standards such as the EOSC AAI and consolidating the policy framework for GDPR-compliant operation.