Hi I know there is a specific order when installing rollup packs. Eg Zone data collector Backup zone data collectors Database connection server (Applies only to Resource Manager for XenApp 5 for Microsoft Windows Server 2003) Primary farm metric server (Applies only to Resource Manager for XenApp 5 for Microsoft Windows Server 2003) Backup farm metric server (Applies only to Resource Manager for XenApp 5 for Microsoft Windows Server 2003) Member server However, does the same rule apply for specific citrix hotfixes? I want to test a hotfix on 1-2 servers and want to know if I should apply it to the ZDC's first.. ThanksAng