**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"
  }