I understand the ability to easily and securely collaborate externally is crucial in Higher Education, where projects often involve researchers, students, and faculty from different institutions.
Currently, Google Workspace for Education accounts generally restrict NotebookLM sharing to within the same domain to ensure enterprise-grade data protection, as seen with other Core Services.
Your request for an Admin Console setting to control this aligns with how administrators currently manage external sharing for other core services like Google Drive and Docs.
We will share this request with the appropriate teams and keep you posted on any other advancements.