Citrix XenApp 6.5 Reboot Policy Minimum Settings
The minimum settings you need configured are (settings are examples)
REBOOT SCHEDULE FREQUENCY: DAYS
REBOOT SCHEDULE START DATE: WHEN TO START – I HAD DATE OF POLICY CREATION
REBOOT SCHEDULE TIME: 01:05 AM
SCHEDULE REBOOTS: ENABLED
You can troubleshoot if its applying in the registry of a machine that has the policy applied to here
HKLMSOFTWAREPoliciesCitrixIMARestart OptionsSchedule
References
http://support.citrix.com/article/CTX130232