Azure and Office 365 From Administrator and User Perspective.
If I understand Microsoft Azure can involve many Administrators to manage their own areas (DBA, Virtualization Administrator, Active Directory Administrator ,etc...)
Office 365 Administrator seems to me that it can be a subset of Active Directory Administrator as they can manage users and Groups , email accounts in addition to billing and other things.
-- Now, who gives right to someone to be Office 365 Administrator ? is it done by Azure Active Directory Administrator ?
-- who gives rights to someone to be Azure Active Directory Administrator ?
--- Do we need special infrastructure to have Office 365 Administrator and Azure Administrator ? I mean do we need to have ADFS in the company ? do we need to have AD connector to connect to Azure ?
How does the Office 365 Administrator get that role ?