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Role Based Access Control (RBAC) is the new permissions model in Microsoft Exchange Server 2010. With RBAC, you don't need to modify and manage access control lists (ACLs), which was done in ExchangeServer 2007. ACLs created several challenges in Exchange 2007, such as modifying ACLs without causing unintended consequences, maintaining ACL modifications through upgrades, and troubleshootingproblems that occurred due to using ACLs in a nonstandard way.

RBAC enables you to control, at both broad and granular levels, what administrators and end-users can do. RBAC also enables you to moreclosely align the roles you assign users and administrators to the actual roles they hold within your organization. In Exchange 2007, the server permissions model applied only to the administrators whomanaged the Exchange 2007 infrastructure. In Exchange 2010, RBAC now controls both the administrative tasks that can be performed and the extent to which users can now administer their own mailboxand distribution groups.

RBAC has two primary ways of assigning permissions to users in your organization, depending on whether the user is an administrator or specialist user, or an end-user:management role groups and management role assignment policies. Each method associates users with the permissions they need to perform their jobs. A third, more advanced method, direct user role assignment,can also be used. The following sections in this topic explain RBAC and provide examples of its use.
Role Based Access Control (RBAC) is the new permissions model in Microsoft Exchange Server 2010.With RBAC, you don't need to modify and manage access control lists (ACLs), which was done in Exchange Server 2007. ACLs created several challenges in Exchange 2007, such as modifying ACLs withoutcausing unintended consequences, maintaining ACL modifications through upgrades, and troubleshooting problems that occurred due to using ACLs in a nonstandard way.
RBAC enables you to control, at...
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