Thank you for the reference. It helps me solve the issue.Also the ASA5516-X with FirePOWER services use classic license, it was indicated on the note that it's not available for classic licenses.Best Regards,

Hello,   I have the same problem with my ASA5516-X with FirePOWER services. I also cannot see the device when I am trying to add a policy. Is it supported for my device? I have also FMC 6.2.1 version.   Thank you in advance for the reply.