Business units are security containers in the Dynamics CRM 2011 system. Business units contain users and teams inside a Dynamics CRM 2011 organization and are created to separate users and teams with different security requirements. Business units might (but not necessarily) correspond to an organization's departments or divisions.
A business unit can be the parent of another business unit, and the first business unit created inside a Dynamics CRM 2011 organization is known as the parent business unit. One or more business units can be created under it; these are known as child business units.
A root business unit is automatically created by Dynamics CRM 2011 when a Dynamics CRM organization is created. This business unit cannot be renamed, disabled, or deleted and does not have any parent business unit.
Business units can also own records. If an entity ownership type is set to Business Owned, the business unit alone can own records for that entity.
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