Details
Communication with instances should use https
Solution
Configuration > System > Administration > System Configurations > System, Time zone, Allowed URLs and Message of the day
Update the value for Communication with instance(s)* to https.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: System and Communications Protection.This control applies to the following type of system Citrix_Application_Delivery.