**To modify an endpoint connection notification** This example changes the SNS topic for the specified endpoint connection notification. Command:: aws ec2 modify-vpc-endpoint-connection-notification --connection-notification-id vpce-nfn-008776de7e03f5abc --connection-events Accept Reject --connection-notification-arn arn:aws:sns:us-east-2:123456789012:mytopic Output:: { "ReturnValue": true }