I need to add an additional domain to our Exchange server. The additional domain would always maintain its own unique domain name; emails sent and received would only come from a specified alias on one of the two domains not both - that is alias@domainA.com would not send from an alias@domainB.com. So essentially we would always run two separate names from our Exchange environment. I want to ensure that this is done and supported before I commit our Exchange box to this.

Done by thousands of customers and done for the past 10 years. Fully supported. Add the additional domain as an accepted one. Add the additional email addresses to the accounts you need - as secondary addresses. The users will always send "as" their primary SMTP address but will have all mail delivered to any address of any domain that is in their account, to their mailbox. The drawbacks to you would be that all mail comes to the person. Exchange doesn't care too much about what domain it was sent to; it translates that to the persons name and that's who gets it. Messages sent to both email addresses just look as if they are for the recipient. "jwmms1" wrote in message news:011260e1-46db-4987-af1a-4580761e7596... I need to add an additional domain to our Exchange server. The additional domain would always maintain its own unique domain name; emails sent and received would only come from a specified alias on one of the two domains not both - that is alias@domainA.com would not send from an alias@domainB.com. So essentially we would always run two separate names from our Exchange environment. I want to ensure that this is done and supported before I commit our Exchange box to this. Mark Arnold, Exchange MVP.

Think I got it. To clarify: User1@DomainA.com has his exchange profile with the primary SMTP as User1@DomainA.com. If mail is sent to User1@DomainA.com or to User1@DomainB.com user1 still gets it. Right? Also, will Outlook create both domain profiles? Will the user still get the 'From' drop down and have the ability to choose both addresses? Just need to make sure I've got this right. Measure twice, cut once!

You didn't want that. You wanted it all into one place. It's all in one profile. It's all one mailbox. That's why I went to great pains to word my reply like I did. If you have changed your mind, or at least the description of the requirement, and need mail differentiating between two recipient SMTP addresses and now have the ability to send then you will need Exchange 2010, Outlook 2010 and use two mailboxes to connect to two MAPI profiles. If you want to do it with anything earlier than the versions of the software you will use ChooseFrom, available at www.ivasoft.biz. "jwmms1" wrote in message news:ce52554f-ff11-4c65-b2b0-751c6e84d27c... Think I got it. To clarify: User1@DomainA.com has his exchange profile with the primary SMTP as User1@DomainA.com. If mail is sent to User1@DomainA.com or to User1@DomainB.com user1 still gets it. Right? Also, will Outlook create both domain profiles? Will the user still get the 'From' drop down and have the ability to choose both addresses? Just need to make sure I've got this right. Measure twice, cut once! Mark Arnold, Exchange MVP.