This book constitutes the refereed post-conference proceedings of the 7th International Conference on Future Access Enablers for Ubiquitous and Intelligent Infrastructures, FABULOUS 2023, held in Bratislava, Slovakia, in October 2023. The 14 revised full papers were carefully reviewed and selected from 35 submissions. The papers are organized in thematic sessions on: future access networks; sustainable communications and computing infrastructures; smart environment applications / scenarios.