**To cancel a Maintenance Window execution**
This example stops a Maintenance Window execution that is already in progress.
Command::
aws ssm cancel-maintenance-window-execution --window-execution-id j2l8d5b5c-mw66-tk4d-r3g9-1d4d1EXAMPLE
Output::
{
"WindowExecutionId": "j2l8d5b5c-mw66-tk4d-r3g9-1d4d1EXAMPLE"
}