https://fortinetcloudcse.github.io/fortimanager-aws-ha-dualaz-cloudformation/2_prerequisites/index.htmlBefore attempting to create a stack with the template, a few prerequisites should be checked to ensure a successful deployment: An AMI subscription must be active for the FortiManager license type being used in the template. BYOL Marketplace Listing PAYG SCALE Marketplace Listing PAYG (Max 2 Devices) Marketplace Listing PAYG (Max 10 Devices) Marketplace Listing PAYG (Max 30 Devices) Marketplace Listing PAYG (Max 100 Devices) Marketplace Listing PAYG (Max 500 Devices) Marketplace Listing The solution requires 3 EIP to be created so ensure the AWS region being used has available capacity. Reference AWS Documentation for more information on EC2 resource limits and how to request increases.Hugoen-US