We are running with NAC 184.108.40.206, now a days i am getting an issue with AV role. user's desktops are installed with symantec antivirus and updated with the definition file. But still they stuck on posture assesment and accroding to report it is user doesn't have AV installed. It's stating "NO AV Detected". This issue is with only couple of users. Attached is the screen shot, any help on this will be appriciable. Thanks.