Sean Metcalf is founder and principal security consultant of Trimarc, aninformation security consulting firm focused on improving enterprise security.He is one of about 100 people in the world who holds the Microsoft CertifiedMaster Directory Services (MCM) certification, is a Microsoft MVP, and haspresented on Active Directory attack and defense at BSides, Shakacon, BlackHat, DEF CON, and DerbyCon security conferences. Sean has provided ActiveDirectory and security expertise to government, corporate, and educationalentities since Active Directory was released. He currently provides securityconsulting services to customers and regularly posts interesting ActiveDirectory security information on his blog, ADSecurity.org. Follow him onTwitter @PyroTek3