{"id":"backup-cross-account-dest-vault-requires-cmk","text":"The destination vault for cross-account backup must use a customer managed KMS key — the default vault (with AWS managed key) cannot be used because its key cannot be shared across accounts.","truth_value":"IN","source":"entries/2026/03/12/aws-backup-latest-devguide-create-cross-account-backuphtml.md","source_url":"","source_hash":"4754aafeb5452a79","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"backup-cross-account-dest-vault-requires-cmk","truth_value":"IN","reason":"premise"}]}}