Final answer:
Deployment Planners, Support Staff, and Logistics Officers are the individuals who receive initial training by the Installation Deployment Officer within 90 days of assignment.
Step-by-step explanation:
Individuals or functions that receive initial training by the Installation Deployment Officer (IDO) within 90 days of assignment include a) Deployment Planners, b) Support Staff, and c) Logistics Officers. The IDO is responsible for ensuring that these key personnel are trained and prepared for deployment tasks to support military operations or other types of assignments. Security Personnel, although crucial to operations, are not specifically listed in the question as receiving their initial training from the IDO.