Active Directory, architectural diagram, IT professional, mature man, (40yo), glasses, short hair, suit, tie, white shirt, sitting, office, conference room, whiteboard, markers, notes, laptop, projector screen, network topology, servers, clients, domain controllers, DNS, DHCP, group policy objects, organizational units, forests, trees, schema, replication, authentication, authorization, access control, Kerberos, LDAP, NTLM, SSL, TLS, encryption, certificates, tokens, single sign-on, multi-factor authentication, auditing, logging, monitoring, troubleshooting, problem-solving, system design, implementation plan, deployment strategy, system integration, security compliance, cloud migration, hybrid environment, panoramic view, 3/4 composition, soft lighting, cinematic atmosphere.