For more info on installing ISA server on a DC, check out Toms article at www.isaserver.org I was almost ready to install it on to one of my domain controllers, however I wasn't prepared to deal with any problems that it may have caused, being the lazy person I am. So I bit the bullet and loaded it all up on another box and after some little learning curves and a lot of reading it works fine. If you are not having any problems on the DC, good stuff, don't complain :-) Greg Mulholland Network Technician MGM Business Machines +613 9500-0644 gregmulholland@xxxxxxxxxxxx www.mgmbm.com.au