Graph databases are being used by companies like Telenor Norway to solve complex problems in identity and access management. These systems store information about parties and resources, along with the rules governing access to those resources, and can handle the complexity of multiplex access and control structures. Graph technology is particularly useful for managing large amounts of data and complex relationships between entities, allowing for faster and more efficient queries than traditional relational databases. The use case from Telenor Norway showcases how a graph database solution improved performance and scalability, reducing queries that once took minutes to milliseconds, and providing better insights and controls for managing identity and access needs in real-time.