def by_conditional_access_policy_id(self,conditional_access_policy_id: str) -> ConditionalAccessPolicyItemRequestBuilder:
        """
        Provides operations to manage the policies property of the microsoft.graph.conditionalAccessRoot entity.
        param conditional_access_policy_id: The unique identifier of conditionalAccessPolicy
        Returns: ConditionalAccessPolicyItemRequestBuilder
        """
        if conditional_access_policy_id is None:
            raise TypeError("conditional_access_policy_id cannot be null.")
        from .item.conditional_access_policy_item_request_builder import ConditionalAccessPolicyItemRequestBuilder

        url_tpl_params = get_path_parameters(self.path_parameters)
        url_tpl_params["conditionalAccessPolicy%2Did"] = conditional_access_policy_id
        return ConditionalAccessPolicyItemRequestBuilder(self.request_adapter, url_tpl_params)

        Provides operations to manage the policies property of the microsoft.graph.conditionalAccessRoot entity.
        param conditional_access_policy_id: The unique identifier of conditionalAccessPolicy
        Returns: ConditionalAccessPolicyItemRequestBuilder
        
msgraph/generated/identity/conditional_access/policies/policies_request_builder.py