It appears that in classical AMD, the file is automatically created; but for HiSpeed AMD I have to create the /keys folder by myself in the directory /usr/adlex/config/ by myself, is that correct?
So far I've only deployed two HiSpeed AMD, not sure if I misconfigred or this is expected for new AMD
I also faced the same situation even with the 'Classic' release 14.4.14.
This is also recommended to take the backup of the keys folder while migrating which I took and then simply copied into the location once I did not find in the new AMDs.
You can create the folder and files by your own.