Hope you all aware about the Role Based Access Control (RBAC) permission model introduced with Microsoft Exchange Server 2010. Here we will discuss more about the RBAC Management Role Assignment Policy. If you are not clear about how RBAC works as a permission model, see http://www.exchangedictionary.com/index.php/Articles/role-based-access-control-exchange-2010.html
As I discussed in my previous post about RBAC, Management role assignment policies associate end-user management roles to users. Role assignment policies consist of roles that control what a user can do with his or her mailbox or distribution groups. When we create an assignment policy we can define all action that a user can do with his or her mailbox. By using an assignment policy you can control what specific mailbox and distribution group settings our end users can modify.