Guys i noticed that office outlook 2007 don't allow exchange account to be established without setting a gateway in the lan configruation, anybody else faced the same ?

Huh? You can't do a LOT of things across subnets without a gateway - there's no way for the system to route traffic across them without it. What are you doing running that way?

man, the machines using ISA Client so they don't need to a gateway, also the exchange server is an internal server in the same subnet with the machines so in all cases its don't need to a gateway, and i was configuring outlook 2003 normally while the machine don't have a gateway, so this behaviour related to outlook 2007 only.