In smaller Exchange environments, one person may be handling all of the administrative roles for an Exchange organization. Larger environments however, will require that roles be distributed to other individuals, which is where the role types come in.
The roles are:
- Exchange Organization Administrator
- Exchange Public Folder Administrator
- Exchange Recipient Administrator
- Exchange Server
- Exchange View-Only Administrator
The Exchange Organization Administrator is the highest role that you can assign, and gives an administrator the ability to configure and control all organization-wide settings, including the administration of Edge servers, Unified Messaging servers, among others.
The Public Folder Administrator, on the other hand, would be an individual who can manage top-level folder objects. They would be able to use the public folder management console, as well as run Exchange Management Shell commands that relate to public folders. The Recipient Administrator gives a user the ability to create and manage recipient objects such as user contacts, distribution groups, dynamic distribution groups and so on.
Next, the Exchange Server’s role would give a person the ability to handle server related tasks, including things like storage group and database control, Client Access server settings, Hub Transport server settings, Unified Messaging settings. That would include things like storage group and database control, Client Access server settings, Hub Transport server settings, Unified Messaging settings; anything under the Server Work Center.
There is also the View-Only Administrators which restricted to only view items in the Exchange organization tree. Finally, the ExchangeLegacyInterop is designed for interoperability with legacy Exchange 2003 servers that may still exist within the same forest.