Billing
All accouns in a aws organisation is treated as one account for billing If you purchase RI from any other account, any other account can enjoy it This can be disabled in the Management acocunt
To share the RI benefits between accounts, both accounts must have sharing turned on
IAM
aws:PrincipalOrgId this key can be used to allow any users from an organisation
Tagging Policies
- Helps standardizing tags across all aws accounts
- Define tag keys and allowed values
- Helps with cost allocation tags and attribute based access control (ABAC)