serviceRoleArn

The Amazon Resource Name (ARN) of the IAM service role for Amazon Web Services Systems Manager to assume when running a maintenance window task. If you do not specify a service role ARN, Systems Manager uses your account's service-linked role. If no service-linked role for Systems Manager exists in your account, it is created when you run RegisterTaskWithMaintenanceWindow.

For more information, see the following topics in the in the Amazon Web Services Systems Manager User Guide:

• Using service-linked roles for Systems Manager

• Should I use a service-linked role or a custom service role to run maintenance window tasks?