A company is using AWS Organizations with nested OUs to manage AWS accounts.

Create an AWS CloudFormation template for the Lambda function and for the EventBridge Scheduler schedule. Create a CloudFormation stack set in the organization's management account. Specify all the existing accounts as the deployment targets. Add new accounts as a stack to the existing stack set when new accounts are created.

Configure an Organizations delegated administrator account for AWS CloudFormation. Create a CloudFormation template for the Lambda function and for the EventBridge Scheduler schedule. Create a CloudFormation stack set in the delegated administrator account. Specify the root of the organization as the deployment target. Activate automatic deployment for the stack set.

Enable AWS Systems Manager operations management capabilities. Configure a delegated administrator account for Systems Manager. Create a Systems Manager Automation custom runbook in the delegated administrator account. Use the runbook to deploy the Lambda function and the EventBridge Scheduler schedule. Specify the root of the organization as the target for Systems Manager Automation.

Create an AWS Systems Manager Automation custom runbook in the organization's management account. Use the runbook to deploy the Lambda function and the EventBridge Scheduler schedule. Share the runbook with target accounts. Specify all the existing accounts as targets for Systems Manager Automation. Add new accounts as targets when new accounts are created.