AWS: Deny access to resources outside your account except AWS managed IAM policies

Using aws:ResourceAccount in your identity-based policies can impact the user or the role's ability to utilize some services that require interaction with resources in accounts owned by a service.

You can create a policy with an exception to allow for AWS managed IAM policies. A service-managed account outside of your AWS Organizations owns Managed IAM Policies. There are four IAM actions that list and retrieve AWS-managed policies. Use these actions in the NotAction element of the statement. AllowAccessToS3ResourcesInSpecificAccountsAndSpecificService1 in the policy.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowAccessToResourcesInSpecificAccountsAndSpecificService1",
      "Effect": "Deny",
      "NotAction": [
        "iam:GetPolicy",
        "iam:GetPolicyVersion",
        "iam:ListEntitiesForPolicy",
        "iam:ListPolicies"
      ],
      "Resource": "*",
      "Condition": {
        "StringNotEquals": {
          "aws:ResourceAccount": [
            "111122223333"
          ]
        }
      }
    }
  ]
}