**Example 1: To view the account settings for an account** The following ``list-account-settings`` example displays the effective account settings for an account. :: aws ecs list-account-settings --effective-settings Output:: { "settings": [ { "name": "containerInstanceLongArnFormat", "value": "enabled", "principalArn": "arn:aws:iam::123456789012:root" }, { "name": "serviceLongArnFormat", "value": "enabled", "principalArn": "arn:aws:iam::123456789012:root" }, { "name": "taskLongArnFormat", "value": "enabled", "principalArn": "arn:aws:iam::123456789012:root" } ] } **Example 2: To view the account settings for a specific IAM user or IAM role** The following ``list-account-settings`` example displays the account settings for the specified IAM user or IAM role. :: aws ecs list-account-settings --principal-arn arn:aws:iam::123456789012:user/MyUser Output:: { "settings": [ { "name": "serviceLongArnFormat", "value": "enabled", "principalArn": "arn:aws:iam::123456789012:user/MyUser" } ] } For more information, see `Amazon Resource Names (ARNs) and IDs <https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-resource-ids.html>`_ in the *Amazon ECS Developer Guide*.