D. Securing domain administrator credentials in a PAM vault and controlling access with role-based access control.
Explanation:
PAM (Privileged Access Management) solutions provide a centralized platform for securely storing, managing, and rotating privileged credentials, such as domain administrator credentials.
By storing domain administrator credentials in a PAM vault, organizations can enforce strong access controls, audit trails, and session monitoring to ensure that only authorized personnel can access these credentials when necessary.
Role-based access control (RBAC) allows organizations to assign specific permissions and privileges based on users' roles and responsibilities. By implementing RBAC, organizations can limit access to domain administrator credentials to only those who require them for their job duties, reducing the risk of unauthorized access.