I'm designing a corporative security IT solution from the raw, which is based on ISA server in a three-homed arrangement, Internet, DMZ and internal network. Among some other requeriments, I propossed the deployement of OWA for mobile corporative users, but my original design includes locating the Exchange 2k front-end server on the DMZ and the only (by this time) existing back-end server, behind the ISA array, I mean, on internal LAN. Is there anybody skiled in such deployment? I think the steps to walk through simply include publishing the back-end server on DMZ for making possible the front-end to connect it correctly. Of course, I realize we must set up the destination set as documentation advices. Some help or experience will be welcome... Thank you.