Data type: PtypEmbeddedTable ([MS-OXCDATA] section 2.11.1)

The PidTagAddressBookHierarchicalRootDepartment property ([MS-OXPROPS] section 2.533) contains a reference to either the root Department object or the root departmental group in the department hierarchy for an organization.<45> The table has either zero rows or one row, which references a Department object or departmental group. If either the Organization object is missing, this property is missing, or the property value is empty, the NSPI server does not have a department hierarchy for that organization.