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Exchange 2010 setup multiple domain emails

Posted on 2011-03-15
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Last Modified: 2012-05-11
I hope this is clear. I have my new exchange server setup on domain apple.com. My users in the apple.com domain will have an AD account and email address.

We also have three other email domains with no link between the apple.com domain and these other domains. Some of my apple.com AD users will have these other email domains. AND I will have some users needing these other domains and NOT be added to the apple.com domain during the mailbox setup.

I need all of these accounts to be setup in Outlook 2010 as MAPI accounts so they each have a complete and seperate group of mailbox folders. Send/Reply email must come from that mail domain and not from the apple.com domain.

I'm trying to setup a new mailbox for grape.com but when I select a new mailbox and new user Exchange is requiring me to enter the AD info for the apple.com domain. It doesn't seem to be able to just create a new email box for the completely seperate domain.
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Question by:Brandon
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11 Comments
 
LVL 7

Accepted Solution

by:
waleeda earned 1000 total points
ID: 35140535
first you need to add those domain in your accepted domains
second after you create the new mailbox you can edit the mail address of that user and you can make it a default smtp address then when he send any message it go through the new mail id you have edited it
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LVL 7

Assisted Solution

by:waleeda
waleeda earned 1000 total points
ID: 35140607
to make easier to you
first image showing how to add accepted domain

second image just clear the down check box "automatic update email address based on recipient policy"
then you can easily change the default smtp ID which has been created automatically
 accepted-domains-1.gif untitled.jpg
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LVL 3

Author Comment

by:Brandon
ID: 35140712
I have a domain accpeted list with a * so it'll accpet all domains.

Second, when I create the user I get the box below. You can see the "new user" box is seting up a domain user in my Apple.com domain. I don't want this to happen...?

 newuser
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LVL 7

Assisted Solution

by:waleeda
waleeda earned 1000 total points
ID: 35140754
yes
correct
because you have a recipient policy defined for you apple.com domain so after you creates the user with the apple mailbox domain, you should go to the recipients mailboxes and edited that mailbox settings by the second screen i have sent before by clear the check box "automatic update email address based on recipient policy" and then you can edit the default smtp address which is user@apple.com to make user@apple2.com

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LVL 3

Author Comment

by:Brandon
ID: 35140799
WALEEDA -

I understand, but when I create the mailbox, it's creating a new AD user in my apple.com domain. I don't want a user to be created since this person already exist in another domain.
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LVL 7

Assisted Solution

by:waleeda
waleeda earned 1000 total points
ID: 35140880
do you mean the AD user account is already created in another domain?
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LVL 3

Author Comment

by:Brandon
ID: 35140911
Yes, the user account is in another domain that is not part of my trust relationship. We've purchased a new company with about 80 employees and I don't want to create a bunch of new AD users in my current company since they already have their own AD.
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LVL 7

Expert Comment

by:waleeda
ID: 35140927
is there any exchange server in the other domain?
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LVL 3

Author Comment

by:Brandon
ID: 35140939
No, they have a hosted service right now. We'll be migrating their email info after the exchange server is setup correctly.
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LVL 7

Assisted Solution

by:waleeda
waleeda earned 1000 total points
ID: 35140973
i recommend you to have a trust relationship first between the two domain, then better you can migrate their AD accounts to you main domain, after that easily you can create a new mailboxes in you existing domain even with different SMTP address as i show you and you can also migrate the old messages from the hosted company to you mail server
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LVL 3

Author Closing Comment

by:Brandon
ID: 35184300
Difficult to award points because the solution is a mixed bag. Basically Exchange won't let you create separate domain structures like a hosting company can without that hosting license which is tens of thousands of dollars.

The solution is to create an OU and add users with unique names such as in the apple.com domain I would have an OU called OrangesEmail. I create UserA-OE in the new OU. Then create the mailbox for oranges.com for that person. Now when UserA-Apple opens their outlook to create a new exchange account they log in as the UserA-OE account.

This creates a separate setup of complete email folders instead of combining the emails in one folder set which I can't have.
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