sourceIdentifier

For Config Managed rules, a predefined identifier from a list. For example, IAM_PASSWORD_POLICY is a managed rule. To reference a managed rule, see List of Config Managed Rules.

For Config Custom Lambda rules, the identifier is the Amazon Resource Name (ARN) of the rule's Lambda function, such as arn:aws:lambda:us-east-2:123456789012:function:custom_rule_name.

For Config Custom Policy rules, this field will be ignored.