For years, many organisations benefited from an unofficial security control: sensitive information was technically accessible, but nobody quite knew where it was. Enterprise AI is rapidly removing that layer of protection. As AI assistants, copilots and autonomous agents gain access to corporate data, collaboration platforms and business systems, they are becoming some of the most knowledgeable participants in the organisation. While AI delivers significant productivity and innovation benefits, it also amplifies existing data security and insider threat risks by making information easier to discover, connect and surface. The challenge for security leaders isn't whether to adopt AI, but how to govern it. As enterprise AI becomes embedded in everyday workflows, organisations must rethink traditional insider threat models and treat AI as a privileged participant in the business. After all, AI doesn't need to break into systems. It simply makes use of the access we've already given it