"Enable incoming http communication" option is grayed out and cannot be unselected.
EcoStruxure Building Operation
Building Operation Workstation
When Building Operation Workstation is connected to the SmartX Server using a HTTP connection, the option to disable incoming HTTP connection is unavailable.
Use HTTPS in Building Operation Workstation to connect to the SmartX Server to allow this option to be unselected.
Refer to the Online Help Topic: Disabling Incoming HTTP Communication