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Exchange 2007 Configuration

I am very new to Microsoft Products and have been tasked with getting Exchange 2007 to work, never used MS for anything.  I have 1 server (Exchange 2007 Standard, 2003 Ent R2) and 2 DCs(2003 Server Standard).  Have Exchange running and it seems to work fine on the main domain I installed under.  I have added 3 domains.  I added the new domains under the Org Config, Hub Transport, accepted domain and address policies.

My problem is some of the users have the same email address prefix (before the @ sign) but different domains.  I am having a heck of a time getting the "new mailbox..." to allow me to assign names and Aliases to any domain except the last one I added.  In fact, on the "new mailbox" form it will only allow me to assign to the root domain.

I tried adding groups to the DC and changed the Recipient Scope to "view all in forest" but nothing allows me to choose anything other than the root domain.

Thanks for any help
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novice-host
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novice-host
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1 Solution
 
Rob GrinageCommented:
I think the problem is that you install Exchange Server in only 1 Active Directory domain (your "main" domain), which also holds the User Account information for the Mailboxes.
You might have to setup the other Domains as "Internal Relay" type, instead of Authoritative.
This article may shed some light:
http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/exchange-2007-smtp-namespace-sharing-different-relay-domain-types.html
 
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novice-hostAuthor Commented:
Could I go back and just add the domain to the Active Directory? One other point, the mail boxes with the same address prefix do not go to the same person:

frank@domainA is not the same person as frank@domainB
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novice-hostAuthor Commented:
I tried the internal relay, didn't work.  I also found out you can't have more than one "main" domain per AD it seems.  Apparently OU is the way to deal with more than one domain.  None of these did me any good.  When I go to create a user for domainA, it will only allow me to select the "main" domain in "New Mailbox...".  I need to find out what I have done wrong or better yet, what I have not done, to fix this.  I have looked at e-mail address policies but I must be doing something wrong with that also, no matter what I try to configure it still will not allow me to change the "login" domain.
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Rob GrinageCommented:
In order to operate several domains in one "forest", you would need to have an Active Directory installation on a separate DC for each one.  Then you would have to configure the various trust relationships and that kind of thing, and then deal with getting the Exchange Server to "see" all of the domains in order to add user mailboxes.  That type of setup goes way beyond my knowledge, maybe someone else would have more detailed advice.
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novice-hostAuthor Commented:
Thanks, that figures.  I will need to find another way to deal with UPN.  I guess a DC for each domain isn't that bad right now, I would need 5, but if the domain list grows to 20 It's not going to work.  Because the focus is only email there may be a better way to "fix" this problem.  Thanks agian.
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