Per blog post query on EnaSupport
From https://cloud-images.ubuntu.com/locator/ec2/ apply filter hvm 16.04 us-east-1 ssd
you will get 1 AMI:
aws ec2 describe-images --image-id ami-80861296 --query 'Images[].EnaSupport' --region us-east-1
[]
AMI from marketplace: https://aws.amazon.com/marketplace/pp/B01JBL2M0O?ref=cns_1clkPro (ami-e4139df2):
aws ec2 describe-images --image-id ami-e4139df2 --query 'Images[].EnaSupport' --region us-east-1
[]
Both AMI's have creation dates > 4.10.17
When I type the exact same commands as you, I get results showing that the attribute is set:
gaughen@glitter:~$ aws ec2 describe-images --image-id ami-80861296 --query 'Images[].EnaSupport' --region us-east-1 [ true ]
gaughen@glitter:~$ aws ec2 describe-images --image-id ami-e4139df2 --query 'Images[].EnaSupport' --region us-east-1 [ true ]
Do you have any issues launching instances with these AMIs? I'm wondering if something is misconfigured in your cli settings.