updateMaintenanceWindowTask

Modifies a task assigned to a maintenance window. You can't change the task type, but you can change the following values:

• TaskARN. For example, you can change a RUN_COMMAND task from AWS-RunPowerShellScript to AWS-RunShellScript.

• ServiceRoleArn

• TaskInvocationParameters

• Priority

• MaxConcurrency

• MaxErrors

One or more targets must be specified for maintenance window Run Command-type tasks. Depending on the task, targets are optional for other maintenance window task types (Automation, Lambda, and Step Functions). For more information about running tasks that don't specify targets, see Registering maintenance window tasks without targets in the Amazon Web Services Systems Manager User Guide.

If the value for a parameter in UpdateMaintenanceWindowTask is null, then the corresponding field isn't modified. If you set Replace to true, then all fields required by the RegisterTaskWithMaintenanceWindow operation are required for this request. Optional fields that aren't specified are set to null.

When you update a maintenance window task that has options specified in TaskInvocationParameters, you must provide again all the TaskInvocationParameters values that you want to retain. The values you don't specify again are removed. For example, suppose that when you registered a Run Command task, you specified TaskInvocationParameters values for Comment, NotificationConfig, and OutputS3BucketName. If you update the maintenance window task and specify only a different OutputS3BucketName value, the values for Comment and NotificationConfig are removed.