Important Considerations - AWS Security Incident Response User Guide

Important Considerations

Accounts directly under the root: When selecting specific OUs for your membership, accounts that are directly under the organization root (not part of any OU) will not be associated with your membership. To include these accounts in your membership coverage, you must first add them to an OU, then associate that OU with your membership.

Note

We are continuously improving the OU association user experience to make the process more intuitive and self-explanatory.