How to create a certificate-based license activated against  AMZN_IID and AMZN_AMI host IDs but these host IDs not available in the drop-down list (Add New Host -> Create License Host). Only available is AMZN_EIP which is another host of AWS, how to use the AMZN_IID and AMZN_AMI?. 

AMZN_IID - will be considered deprecated. As we have a better alternative in the server host list VM_UUID for the same use case, this ID already available in the FNO UI.  This is a server line ID.

AMZN_AMI - is an Amazon template ID for Amazon EC2 environments and this hostid applicable only to the FEATURE lines. We can not use this in the server line for Licensing server. It also uniquely identifies the AMI template from which an instance is created. It does not uniquely identify AMI instance so this is clients only.