Organization Management
The Organization Management management role group is one of several built-in role groups that make up the Role Based Access Control (RBAC) permissions model in Microsoft Exchange Server 2013.
Important:
The Organization Management role group is a very powerful role and as such, only users or universal security groups (USGs) that perform organizational-level administrative tasks that can potentially impact the entire Exchange organization should be members of this role group.
The following are some ways you might want to customize this role:
1.Permissions owner
2.Active Directory split permissions