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When an IAM user with AdministratorAccess receives an AccessDeniedException while attempting to create subscriptions in the Management Account, it typically stems from one of two issues outside of standard IAM policies:
- Service Control Policies (SCPs): Check your AWS Organizations configuration to ensure no SCP at the Root or OU level is implicitly or explicitly denying this action.
- Account Verification Hold: AWS frequently places automated backend blocks on accounts preventing the provisioning of paid subscriptions (like Pro+ tiers) until the account is fully vetted.
Since you have already verified your IAM permissions and Identity Center setup, if your SCPs are not blocking the request, this cannot be resolved via the console. You will need to open a case with AWS Billing and Account Support and ask them to check for any backend provisioning holds on your account.
References:
- Checking Service Control Policies (SCPs): https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_policies_scps.html
- AWS Support Center (For backend holds): https://console.aws.amazon.com/support/
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