A company deployed IAM Organizations to help manage its increasing number of IAM accounts.

1 Put all users into an IAM group with an access policy granting access to the J bucket.

Have the account creation trigger an IAM Lambda function that manages the bucket policy, allowing access to accounts listed in the policy only.

Add an SCP to the Organizations master account, allowing all principals access to the bucket.

Specify the organization ID in the global key condition element of a bucket policy, allowing all principals access.