I need to setup up mailboxes for a second email domain.I have added the second domain to my accepted domains under organization/hub transportI have created and email address policyNow when I go to recipient config/ mail box and add a mailbox when I get to the user information page the organizational units and the dropdown next to User Principal Name only contain my original (machine) domain name.Do I need to add another domain.....LOSTThanksfor your help

Well, adding new domain in accepted domains allows you to add email address domains while creating email address policy.You need to add UPN suffix intoActive Directory Domains and Truststo set/select the domain names in UPN while creating users and while login in OWA.HOW TO: Add UPN Suffixes to a Foresthttp://support.microsoft.com/kb/243629Amit Tank | MVP - Exchange | MCITP:EMA MCSA:M | http://ExchangeShare.WordPress.com

thank you very much.Problem solved