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Adding 2nd domain to Exchange Server

Posted on 2004-03-29
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Last Modified: 2010-03-05
Dear Experts,

This may be a long questions so I will try to summarize.  Our company has a Windows 2000 Small Business Server.  We use the server for our Domain’s (mydomain.com) email and webpage.  We are also hosting a few other webpages for other domains in IIS on this server which we separate by IP.  Our problem began when this company created another company which we will call 2nddomain.com.  They would like to receive mail from that domain, which WOULD be easy to do.  We could have just added that 2nddomain.com to the recipients policy and be done with it.  However, when they respond to messages they want to be able to have a reply address of the new domain.  Basically, switch between the two and have completely separate exchange boxes.  This would work to setup the Outlook client with separate profiles with one mailbox to mydomain and the other to 2nddomain.  I attempted to setup all of this already and I could get it to work, but I was having problems with the Outlook Webaccess for the 2nddomain.  I couldn’t get it to allow any of the 2nddomain users in.  What I am asking is if anyone knows the proper way to setup a second email domain on this exchange server so that it is separate from the existing domain.  It would be nice to use the same usernames for both domains, but I don’t think that is possible and it is not critical if we can’t.  I have read a lot on exchange however I can’t seem to find an answer to this specific problem.  I am not sure if I need to actually setup a seperate domain to accomplish this or if exchange can make the changes.  Can anyone enlighten me on this question?  Thank you.  I know this question is worth 500 points, but I didn't have them at the time.  I will continue to add the points when I get them.

Isaac
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Question by:sqwasi
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visioneer earned 50 total points
ID: 10707478
Your best bet would be to create two seperate email boxes for the users who want to have mail at both domains.  The mailboxes can reside on the same Exchange server.  You would configure the default SMTP address for each user to be whichever one they wanted to be their reply address.

For example...

UserA has a default SMTP address of usera@domainA.com
UserB has a default SMTP address of userb@domainB.com

These users would be the same person who had two seperate accounts within Active Directory.  

If you give the UserA account full permissions over the UserB mailbox, and specifically the "Send As" and "Receive As" permissions, then the person can log in as UserA and open the mailbox for UserB, and even send as that person.

If you want all the email for both accounts to go to only one mailbox, that's easy too.  Just configure the properties of UserB to forward all their mail to UserA (Active Directory Users and Computers -> user properties -> Exchange General tab -> Delivery Options).  Then all the mail for both accounts would go to the UserA mailbox, and that person only has to log in to one spot.  When he/she wants to send email using the email address "userb@domainB.com", they just change the From field to UserB.  To do this, while composing a message select "View" then "From field".

Does this make sense?  Let me know if you need clarification on any of this.


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