➀ The QuNET Initiative, funded by the German Federal Ministry of Education and Research, is preparing a large-scale final experiment to connect multiple users securely within the Berlin metropolitan area using quantum technology. ➁ The experiment involves setting up a network of six nodes in Berlin, utilizing both fiber optic and free-space connections, to demonstrate the exchange of sensitive data between institutions using quantum cryptography. ➂ This experiment is a significant step towards realizing complex multi-user quantum communication networks, following previous successful demonstrations of quantum-secured connections and key exchanges.