Under the frame work of Horizon 2020 program funded project, Cryst^3, we will hold a workshop on 17-18 June 2025, in Limoges, France. The Quantum In Photonics Microstructures workshop will convene leading experts to explore advancements in quantum technologies within microstructured devices, covering both foundational research and emerging industrial applications. Discussions will also address the broader implications of quantum innovation on industry and research frameworks. We're delighted to announce that Philip Russell, Hidetoshi Katori, Dmitry Budker, Alexander Gaeta, Miles Padgett, Helmut Ritsch and Fetah Benabid, have confirmed their participation as plenary speakers. In addition, the workshop will feature presentations from pioneering companies in the field of quantum technologies, offering insights into the latest industrial developments. We warmly invite you to submit a poster presenting your recent work. A student prize, sponsored by OPTICA, will be awarded for the best student poster, providing an excellent opportunity for young researchers to gain recognition. Secure your spot by registering at the event website.