How many types of Administration and how is most Important for administration manager ?

Account Administrators -- The top-level, fully authorized email administrator Monitor Administrators -- Observe the activity and status of the hierarchy Compliance Officers and Security Administrators -- Prevent illegal and unethical conduct across the account hierarchy Archive Administrators -- This includes the Archive Security Administrator, Archive Search, Audit, Retention, and Investigator Security administrators for the account. (Message Archiving is available optionally for an additional fee.) Email Config Administrators -- Maintain mail flow and server connections Organization Policy Administrators -- Manage common settings and services User Administrators -- Manage the day-to-day user help desk needs