Leave it alone. If you are running Advanced then it will not work as it will not be able to obtain a valid license. This CPU/Memory optimization is for Enterprise only. Joe _____ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jon Luchette Sent: Friday, February 08, 2008 7:40 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Citrix Virtual Memory Optimization Service I have servers running PS4.5 Advanced Edition. The "Citrix Virtual Memory Optimization" service is shown in a manual state and not running on all. Is this feature only available on Enterprise edition? Do most people normally enable this in their default citrix server builds?