Yes, License 11.6.1 and XenApp 4.5 can reside on the same server. Why do you reboot your servers nightly? Webster From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Heflin, Janet Subject: [THIN] Citrix license services 11.6 and Citrix 4.5 Quick question Can Citrix License Services 11.6 and Citrix 4.5 Servers reside on the same server? Also we reboot the Citrix servers nightly