dear All, dear Andrew, thank you for providing me with the valiable information regarding OWA. i made & its working Perfect. ========================================================= today, i have another issue, my manager made 2 separate Domains ( mailserver ) & ( webserver ). both of them they are in the same subnet mask , without any trust relationship between them at all. but they can access each other. now as i said our exchange server which is under the domain ( mailserver )is on line and configured correectly. and the outlook web access working internally no any problem. also, our webserver, which is under the domain ( webserver ), is connecting on line. and when some one from out side type :- http://www.ahmed-electro.com.eg, the web site which is locally stored on the webserver display normally. there is no any Problem at all. what i need is, from the web server which i have i want to make virtuall directory and name it wmail, and this virtual directory should map to exchange server which is located on the other domain which is ( Mailserver ) , then to drive ( M), then to MBX folder under it. but when i implement this , i found that , there is an error indicator for the virtual directory with the Red Circule that indicate there is an error. even there is no any data under that virtual directory . ======================================================= can any one advice me, is it important for IIS to publish OUTLOOK web Access to have the exchange installed on the same machine as well as the IIS or not or , i can install exchange server on separeate Machine with IIS & then install another IIS on another Machine and then let the second IIS to be published on line. Can I ? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com