Computer Configuration > Policies > Centrify Settings > Mac OS X Settings > Energy Saver > Set computer sleep time
Specify the number of minutes of inactivity to allow before automatically putting a computer into the sleep mode.
If you enable this group policy, the period of inactivity you specify applies only when the computer is using its power adapter. If the computer is inactive for the number of minutes you specify, it is put in sleep mode.
Enabling this group policy is the same as selecting a time using the Put the computer to sleep when it is inactive for slider in the Sleep pane of Energy Saver system preference.
To prevent the computer from ever going into sleep mode, enter
0 for the number of minutes, or disable the policy.
This policy can take effect dynamically at the next group policy refresh interval.