Citrix servers that have been upgraded from 14.3 RU4 to RU5 (Build 14.3.8259.5000) are loading an instance of ccSvcHst.exe for every user even though the setting for "Disable the notification area icon" is enabled and the "LaunchSMCGui" registry key is set to zero. This is keeping Citrix sessions open after users exit their applications.
Citrix Terminal Servers/Terminal Servers
Release : 14.3 RU5
Component : Policy
This issue has been fixed in build 14.3.8268.5000. Upgrade to this latest refresh build of SEP 14.3 RU5 if you're experiencing this issue.