It should not affect the actual application of policy to a system, you just won't be able to edit ADMX based policies on anything other than Server 2008 or Vista. The actual policy settings are not contained in the ADM/ADMX files themselves. They are just a roadmap that tells the Group Policy Object Editor console how to edit the registry.pol file in the GPO. Hope this clears it up for you. Jamie Nelson | Systems Engineer | Systems Support, Information Technology | I N T E G R I S Health | Phone 405.552.0903 | http://www.integrisok.com <http://www.integrisok.com/> From: gptalk-bounce@xxxxxxxxxxxxx [mailto:gptalk-bounce@xxxxxxxxxxxxx] On Behalf Of Shudnow, Elan Sent: Monday, January 28, 2008 5:25 PM To: gptalk@xxxxxxxxxxxxx Subject: [gptalk] ADMX and Co-existence with Pre-Vista/2k8 So let's say I decide to implement Server 2008 and will be co-existing with Server 2003 for a while and 50% of my clients are XP and 50% are Vista. Vista and Server 2008 support ADMX and I know I'll need to use Server 2008 to manage the ADMX files. My question is, if I use Server 2008 to create a GPO, I know it will be created in ADMX and if I use Server 2003 to create a GPO, it'll be in ADM. My question is, if I do use Server 2008 to create the ADMX at the root of the domain so it applies to all computers in the entire domain, how will the XP clients and Server 2003 servers look at this ADMX? Will it just ignore it? Is there a patch to make Server 2003 and XP machines understand how to apply ADMX? What is the end result? Thanks, Elan ********************************************************************** This e-mail may contain identifiable health information that is subject to protection under state and federal law. This information is intended to be for the use of the individual named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited and may be punishable by law. If you have received this electronic transmission in error, please notify us immediately by electronic mail (reply). This e-mail may contain identifiable health information that is subject to protection under state and federal law. This information is intended to be for the use of the individual named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited and may be punishable by law. If you have received this electronic transmission in error, please notify us immediately by electronic mail (reply).