Following http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/stacksets-prereqs.html
- Login to Parent Account and
(open in new Tab)
- Write down Parent Account Id (we need it later)
- For each Child Account, Login to Child Account and
(open in new Tab)
- Login to Parent Account and find the OU in Organizations that you want to enable CloudTrail for via: https://console.aws.amazon.com/organizations/home?region=eu-west-1#/browse/
- Write down the OU-ID (ou-12xx-xxx12345)
- Create a new StackSet via: https://eu-west-1.console.aws.amazon.com/cloudformation/stacksets/home?region=eu-west-1#/stacksets/new