Hi we have Threee site exchange 5.5 server setup. 1.corp, 2. site 1 3. site 2 This sites connected by Site connecteor and X.400 connector respectively. Corp site is installed IMS and connected to internet. Corp server is responsible for sending and receiving mails from internet for all the three sites. Now My problem is Only corp site users are able to access OWA. Other two site users are not accessible from internet. I desperately need those users should also be accessible from internet. Rest of the things are working smoothly. I havenot installed IMS on Site2 and sit3. I have three diiiferent exchange 5.5 servers for three sistes. All are in differnt Windows NT domain which connected by trust relation ship. Any one can Help me on this. Regards Aboo Arif