If your utility uses Microsoft Windows in a networked environment, there’s a near 100% chance you use Active Directory (AD) to centrally administer domains, machines, users, and groups. And like many legitimate tools, if not securely configured, can be a threat actor’s dream for gaining a foothold and hiding in plain sight within your environment. Using AD tactics is nothing new for threat actors, but two recent very large-scale compromises – SolarWinds and Microsoft Exchange – emphasize the importance of securing AD. When is the last time you reviewed your AD configurations?