This setup allows AWS Config to perform cross-account operations without requiring administrators to manually configure permission policies in each account.
The following steps include:
Sign in to the AWS Management Console as the management account and open AWS Config.
Open AWS CloudShell.

Execute the following two commands:
aws organizations enable-aws-service-access --service-principal=config-multiaccountsetup.amazonaws.com
aws organizations enable-aws-service-access --service-principal=config.amazonaws.com