Dear All, I would like first of all, to thank every one who helped me in my exchange questions regarding the disaster receover . Now, we are decide to use a nother setup for exchange server as the following :- 1- we have Firewall ( HW ) Cisco-PIX firewall, and it has this Real IP Address 18.104.22.168 2- we dicede to host our exchange server On-line and the MX record for our mail server will be the external IP-address of Firewall which is ( 22.214.171.124 ). 3- We will use NAT inside the Firewall, and it will deliver the E-mails to Internal IP of Exchange server . 4- We opend all the Ports Internal & external on the Fortigate. 5- we dicide to use OWA . For example :- if one of this users has already an Exchange account , in side his Office, and this Account Configured to deliver the E-mails to Personal Folder on his PC rather than Mailbox on the exchange server, and this user left for temp work in USA. now this user wants the following ( during his Temp Work in USA ) :- A- Access the E-mails which came to him directly during his temp work. B- want in the same time to access his Old inbox, contact & Calender & His Task & sent itmes which he worked on it while in the office . if he type from the web browser ( http://webmail.mydomain.com ), will he be able to see the following :- A- Access the E-mails which came to him directly during his temp work. B- want in the same time to access his Old inbox, contact & Calender & His Task & sent itmes which he worked on it while in the office . ============================================================================= Please Note, i have only One Domain Controller & One exchange server , and all of them is Win 2033 Enterprise Edition, Exchange has SP2 . i do not have at all, another server for exchange , and i did not implement at all Front End / Back End server at all. ============================================================================ please try to guide me , if you do not mind guys . thanks for you in advanced .