A system and method for providing secure access to an organization's internal directory service from external hosted services. The system includes a remote directory service configured to accept directory service queries from an application running on hosted services. The remote directory service passes the queries to a directory service proxy server inside a firewall of the organization via a secure connection service. The directory service proxy server passes the queries to the internal directory service inside said firewall. Request responses from the internal directory service pass through the directory service proxy server to the remote directory service through said firewall via the secure connection service. The remote directory service returns the response to the requesting application.