Makes purchases, manages subscriptions, manages support tickets, and monitors service health.
Sign up to purchase Office 365, you become a global administrator
Resets passwords, manages service requests and monitors service health
Administers services, such as Microsoft Exchange Online, but does not require access to user management and other administrative functions.
User Management administrator
Resets passwords, monitors service health, and manages user accounts, user groups, and service requests. Cannot delete a global admin or create other administrators