I need to move the DHCP off of the switch and onto a server, this is to accomidate a SCMM install. What is the best way to do this without affecting my users for too long. I would like to make all the scopes on the sever, set up the reservation and once it is all done then go and flip the switch. I know I will need to remove the settings on the Cisco 4507 and then include a DHCP helper address. Does that address need to go on all the vlans or is it a global setting? If I leave off the helper address can I do all the configuring without bothering the users?