Maintain AD sites, subnets, site links, and replication topology; troubleshoot replication failures, latency, and lingering objects; and maintain domain-controller health, SYSVOL, DFSR, time sync, AD-integrated DNS, and FSMO roles. Support integration testing between AD and Okta or other approved identity platforms, validating synchronization, authentication flows, attribute and group mappings, provisioning, and SAML, OIDC, OAuth, SCIM, or LDAP protocols, and documenting test results.