Hi everyone; I posted this question yesterday, but I was not able to receive mail from isaserver site, so I give it a try today. I have set up exchange and OWA and they are working just fine, and users are able to use OWA inside the LAN. But, they can't access their mailbox using OWA from home, typing the URL, http:/<dns name>/exchange/<username>. I have followed the instructions in the learning zone, the set up of OWA is done exactly the same way. also, the dns settings are correct. I was wondering if there was anything else beside these steps that needs to be done or maybe the URL is incorrect, or the settings of the ISA server needs to have some changes, and if not, any tips? thanks, Farshad