def by_administrative_unit_id(self,administrative_unit_id: str) -> AdministrativeUnitItemRequestBuilder:
        """
        Provides operations to manage the administrativeUnits property of the microsoft.graph.directory entity.
        param administrative_unit_id: The unique identifier of administrativeUnit
        Returns: AdministrativeUnitItemRequestBuilder
        """
        if administrative_unit_id is None:
            raise TypeError("administrative_unit_id cannot be null.")
        from .item.administrative_unit_item_request_builder import AdministrativeUnitItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["administrativeUnit%2Did"] = administrative_unit_id
        return AdministrativeUnitItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the administrativeUnits property of the microsoft.graph.directory entity.
        param administrative_unit_id: The unique identifier of administrativeUnit
        Returns: AdministrativeUnitItemRequestBuilder
        
msgraph/generated/directory/administrative_units/administrative_units_request_builder.py