Event ID 4662 is a Windows Security audit event generated when a process accesses an Active Directory object, such as a user, group, or domain naming context, and object auditing is enabled. It is most useful when administrators configure the correct SACLs and enable Directory Service Access auditing, because the event can then show which account requested access and which directory object was touched.
In cyber security, 4662 matters because it can expose suspicious directory activity tied to privilege abuse, including DCSync-style attempts to read replication-sensitive data. Defenders look for unusual access to objects that carry replication rights or other high-value permissions, especially when the caller is not a normal domain controller. Used with other logs, 4662 helps separate legitimate directory maintenance from stealthy credential-access behavior.