Exchange 2003 multiple domains with ability to choose sending address : exchange, multiple, 2003, domains

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11.16.2004 at 06:07AM PST, ID: 21208419

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6.8

Exchange 2003 multiple domains with ability to choose sending address

Zone: Exchange Email Server

Tags: exchange, multiple, 2003, domains

I need to host a 2nd domain on my Exchange server. Most articles I find discuss how to simply add another domain to the recipient policy area. However, if I understand this properly, only one domain can be the default for a user and all "reply to" information will reflect this domain. My users need to use both domains though. When they send a reply, it should reflect the domain that the mail was sent to. We currently do this using separate POP3 e-mail accounts. Outlook automatically send the reply through the account it came in on and for new messages we can select which account to use in the client. I want the same scenario under Exchange 2003. So a given user might have:

joe@abc.com and
joe@xyz.com

I've read that the only way to do this is to set up separate boxes. Does this mean I'll have to setup another domain in AD and if so, how? My current setup is that I have one AD domain that serves one e-mail domain, abc.com.

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Question Stats

Zone: Networking

Question Asked By: pcspcs

Solution Provided By: Sembee

Participating Experts: 11

Solution Grade: B

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11.16.2004 at 07:22AM PST, ID: 12594515

Rank: Sage

ikm7176:

When you have more than one address type, you must specify one address as primary. The primary address is the one that appears in the From line in outgoing e-mails.

visit http://www.ivasoft.biz/choosefrom.shtml , they have the software which suits your requirements.

11.16.2004 at 07:40AM PST, ID: 12594690

pcspcs:

I don't want to use third party software for this solution. I'm perfectly happy using the solution that requires me to setup two separate mailboxes for each user, just like they currently have using POP3 accounts. The question is how to setup AD and Exchange to allow joe@abc.com and joe@xyx.com to exist on my same server, each one as a separate account.

11.16.2004 at 09:08AM PST, ID: 12595773

Rank: Savant

Sembee:

Thats easy enough to achieve.
Don't have either account with the user name of joe. Make them joe.smith and joe.jones as the username. Configure joe.jones@ and joe.smith@ as their email addresses.
Then disable the option for RUS to update automatically and enter your prefered email address on each user. Make the new address default and Exchange will accept them.

Simon.

11.16.2004 at 09:55AM PST, ID: 12596296

pcspcs:

I think you misunderstand. Joe is one person. He works for both companies. When he's working with customers of abc.com he needs to appear (both in new messages and replies) as joe@abc.com. When he's working with customers of xyz.com he needs to appear as joe@xyz.com. Changing his email address would be out of the question anyhow since he already has customers that know him by each of his two addresses, joe@abc.com and joe@xyz.com. It currently works just fine with joe@abc.com being accessed one POP3 account and joe@xyz.com being accessed via a separate POP3 account. Outlook automatically replies using the account the original message was sent to and an account can be chosen from the accounts menu when sending new messages.

We want to move mail hosting for both abc.com (which happens to also be the internal AD domain that he can locally log into) and xyz.com.

Abc.com has already been moved to the internal Exchange system. I need to know how to host mail for xyz.com on the same server.

Perhaps a better way to have asked this question would be to ignore that some users are on both domains and just ask how to host mail for two unassociated companies with unassociated domains on the same server. If a user happens to work for both companies, they'll have an account on each system.

11.16.2004 at 11:03AM PST, ID: 12597000

Rank: Genius

Kidego:

http://www.ivasoft.biz/choosefrom.shtml

It works well...

D

11.16.2004 at 11:45AM PST, ID: 12597378

Rank: Savant

Sembee:

The scenario I have outlined above is the resolution for your problem.

You cannot have two accounts both called "joe" on the same system. Therefore you need to identify them uniquely. If one account is called "joe" and you add the second domain to Exchange then Exchange will add the second domain. The problem is that you have no means with Exchange natively to choose which address the email comes from. The utility mentioned above is the fix for that.

Alternatively, what you can do is have the email messages all go in to the same account using the forward option in Exchange and then use the from line to control which account they come from.

Simon.

11.16.2004 at 12:51PM PST, ID: 12597994

pcspcs:

Yea, the scenario would work as long as Joe Jones doesn't mind being known as Joe Smith to some of his customers. :-)

Seriously it doesn't make sense that I cannot have two accounts called "joe" if they are on different domains? If they are for different domains, then Exchange should be able to distinguish them apart. That would mean that if I'm a hosting provider I can't host email for two customers on the same server unless I make sure their user names are unique, which would be impossible. That's essentially what I'm trying to do here -- host two company's mail on one server. I'm sure plenty of providers do this, but I've never seen a requirement that my users can't have anything to the left of the @ that overlaps with what some other company who might be hosted on the same server already took. The way this is solved on Netmail is that the username is actually the whole email address. Surely there's a way to accomplish this with Exchange, a much more sophisticated system.

You say that Exchange doesn't know which address mail is to come from. Would it not work the same way with two exchange accounts as it does with two POP accounts? I would assume that if I added both of Joe's accounts to Outlook just like I currently have two POP3 accounts added, that Outlook would have the same drop down menu for choosing an account as it does now for POP3, except that instead of each account being one of his POP accounts each one would be one of his Exchange accounts. I've not see this done, but that's what I'm after.

11.16.2004 at 01:10PM PST, ID: 12598213

Rank: Genius

Kidego:

I think domains is confusing here...SMTP domains, have as many as you want, but only one is primary address on the mailbox/user. AD domains, different. Still though, you cannot have 2 identical objects in the forest. And yes, you can use the UPN which resembles the email address, but there's still only one of those for a user object. This is a unique object in AD, not a listing in a POP site. You can only have one mailbox per user object. So unless you want an exchange server for each SMTP domain, which is a different forest (and no, that isn't what you want), then you either allow messages to go out with the primary address, or use a 3rd party tool that allows the Outlook client to choose which email address they send with. Just a short analysis....

D

Assisted Solution

11.16.2004 at 02:55PM PST, ID: 12599268

pcspcs:

"And yes, you can use the UPN which resembles the email address, but there's still only one of those for a user object."

But I'm not trying to make this work for a single user object. I have no problem creating two user objects - one to handle mail for each account. One user object would be created for joe@abc.com and another user object for joe@xyz.com. Joe would then add both of these accounts under Outlook.

Is that not possible?

If this requires creation of another forest, AD domain, or OU to hold the various user objects, that's fine with me.

11.16.2004 at 03:09PM PST, ID: 12599364

Rank: Savant

Sembee:

The solution I have given you above is the way to do it. As long as the username and the email addresses on the accounts are unique then the AD will let you enter them.

You need to make sure that neither of the accounts are called "joe" as this could cause problems with email addresses and other objects. Creating two accounts with joe1 and joe2 as the Windows usernames will be fine. Then attach which ever email address you want to the accounts.
Both accounts will require an email address on your primary domain - but this does not have to be the default address that emails go out with - once the accounts are created then you can adjust them each by hand to change the default addresses.

It is a very common question with multiple internet domains on one server.

Simon.

Accepted Solution

11.16.2004 at 06:00PM PST, ID: 12600270

pcspcs:

Sembee,

Unless I missed something, the solution you provided will not work for me because it's an absolute must that Joe retain his two existing email addresses of joe@abc.com and joe@xyz.com. I cannot ask all users to give up one of their existing e-mail addresses. They also expect that when they reply in Outlook, the reply will originate from the account the original message was sent to since that's what it does now.

Further, we'll later add a few domains that are hosted for other unrelated companies. While these users will only have a single address, I won't be able to require that they don't pick any names that overlap with any names at other hosted companies that they know nothing about. Chances are they wouldn't overlap, but you never know. These folks will probably only access via POP3 though... not sure yet.

Kidego, you mentioned that I can "UPN which resembles the email address, but there's still only one of those for a user object". Does this mean that I could use the full email address as the user object name, thus making them unique? If so, how?

11.16.2004 at 06:10PM PST, ID: 12600301

Rank: Genius

Kidego:

This is what I was referring to:

http://support.microsoft.com/kb/243280

D

11.17.2004 at 12:31AM PST, ID: 12601778

Rank: Sage

ikm7176:

you might find this link helpful

http://www.winnetmag.com/MicrosoftExchangeOutlook/Article/ArticleID/22404/22404.html

11.17.2004 at 05:37AM PST, ID: 12603784

Rank: Savant

Sembee:

I will take what I wrote and break it down further.

"Don't have either account with the user name of joe. Make them joe.smith and joe.jones as the username.
Configure joe.jones@ and joe.smith@ as their email addresses. "
ADDITIONAL NOTE: This is an interim step. I could possibly have used a better example of joe1@ and joe2@.
The KEY point is that if you create an account with "joe" as the username then RUS will apply joe@ to all domains on the first account. Undoing that mess can provide interesting as you need to allow time for replication of that information (adding the email addresses initially, then removing them, then adding the new ones).

Then I said...

"Then disable the option for RUS to update automatically and enter your prefered email address on each user. "
ADDITIONAL NOTE: By this step I meant that you could enter joe@domain1.com on the first account and joe@domain2.com on the second account.

Then I said:
"Make the new address default and Exchange will accept them."
ADDITIONAL NOTE: The end result is two seperate accounts, both with joe@ on their email addresses.

As the others have already said, you cannot have two objects with the same name - beit email address or username. However with care you can change the default email addresses so that the username and email address are not the same. The only catch is that you cannot do it through the wizard, you need to make manual changes directly in ADUC.

The last hosting company I worked with created all their users with username@companyname (not the domain name and it was something short).
This meant that you could have jsmith@cars, jsmith@trucks etc.
If you are likely to have lots of unrelated companies on this same server perhaps that is the way to go - it would make identification of who the user belongs to much easier.

Somehow an easy task has become over complicated and it is difficult to see where.

Simon.

11.18.2004 at 02:30PM PST, ID: 12619871

pcspcs:

Sembee,

Thanks for the additional info. You're right, it was much easier than I was making it.

I created two accounts, joe1 and joe1. I set an smtp address for joe1 of joe@abc.com and one for joe2 of joe@xyz.com.

Unfortunately, I found out that Outlook won't let you add two Exchange accounts like it will two POP accounts. I can get around this by having the user access only their primary one as an Exchange account and access the 2nd one as POP3. They can still file their POP3 mail in the mailboxes that get stored on the Exchange server so they are available when they login via OWA. With this method, they can use the "account" drop down to choose which one to send from and replies will always go out from the one they arrived from.

The only down-side of this is that when the user is working remotely via OWA, they won't get any new POP3 mail when logged into that first account where all their mail is stored. They also won't be able to send mail from the 2nd account unless they logout of OWA and back in with the 2nd account, but they won't be able to file their messages in their folders that they normally use (since they'd be tied to the first account). It'll be sort of a kludge when working remotely, but it will work somewhat.

Thanks to Sembee and Kidego. I'll split the points. If you have further comments on the "downside" I wrote about above, please chime in.

11.18.2004 at 02:34PM PST, ID: 12619905

pcspcs:

By the way, I did try the software mentioned. It was okay, but sort of cumbersome to use. If used, it would be almost a requirement to also get the com plugin that will automatically select the account for a reply that the original came into. Perhpas the biggest downside is that it doesn't help when using OWA.

12.14.2004 at 08:21PM PST, ID: 12826682

darylmaunder:

The waty I deal with this is to setup the users's exchange account with both addresses like you currently have. Then in Outlook, add a pop/smtp account for the second address, with the smtp server set to the exchange server. Then in Send/Receive groups (it is a few clicks deep) you set the pop/smtp account to be for sending only, not receiving. So what username/password you put doesnt matter.

Then when you create a message, you can choose the account to use.

12.15.2004 at 10:16AM PST, ID: 12832882

pcspcs:

Darylmaunder,

That makes sense. There is one advantage to letting Outlook pull the mail in via POP though. By doing so, Outlook knows which account send replies out on automatically, so the user doesn't have to remember to switch.

But the biggest problem with all of this is the lack of any solution for OWA users. It seems like it would be a simple matter for MS to add some way to choose an "identity" natively that would function in both Outlook and OWA. Maybe will see it in some future version.

12.22.2004 at 06:46AM PST, ID: 12884127