A search query is received from a first user through one or more input devices. A set of results is determined from content stored on a computer system based on the search query. The set of results includes a first subset of results not accessible to the first user due to access control. A list of results is provided to the first user. The list excludes the first subset of results. A target result is identified from the first subset of results. An owner is identified with control over access to the target result. The owner is notified that the target result is not accessible to at least one user.