**To update a maintenance window task** The following ``update-maintenance-window-task`` example updates the service role for a maintenance window task. :: aws ssm update-maintenance-window-task \ --window-id "mw-0c5ed765acEXAMPLE" \ --window-task-id "23d3809e-9fbe-4ddf-b41a-b49d7EXAMPLE" \ --service-role-arn "arn:aws:iam::111222333444:role/aws-service-role/ssm.amazonaws.com/AWSServiceRoleForAmazonSSM" Output:: { "ServiceRoleArn": "arn:aws:iam::111222333444:role/aws-service-role/ssm.amazonaws.com/AWSServiceRoleForAmazonSSM", "MaxErrors": "1", "TaskArn": "AWS-UpdateEC2Config", "MaxConcurrency": "1", "WindowTaskId": "23d3809e-9fbe-4ddf-b41a-b49d7EXAMPLE", "TaskParameters": {}, "Priority": 1, "TaskInvocationParameters": { "RunCommand": { "TimeoutSeconds": 600, "Parameters": { "allowDowngrade": [ "false" ] } } }, "WindowId": "mw-0c5ed765acEXAMPLE", "Description": "UpdateEC2Config", "Targets": [ { "Values": [ "57e8344e-fe64-4023-8191-6bf05EXAMPLE" ], "Key": "WindowTargetIds" } ], "Name": "UpdateEC2Config" } For more information, see `Update a Maintenance Window (AWS CLI) <https://docs.aws.amazon.com/systems-manager/latest/userguide/maintenance-windows-cli-tutorials-update.html>`__ in the *AWS Systems Manager User Guide*.