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Exchange multiple contacts same external smtp address

Posted on 2014-02-10
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Last Modified: 2014-03-10
How would one handle multiple contacts pointing to the same external smtp address. I cannot create multiple contacts with the same SMTP address please help
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Question by:techdrive
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Expert Comment

by:chriskelk
ID: 39847192
Exchange will only allow one instance of any email address, so it can't be done in the way
you ask.  

Why do you need multiple contacts pointing to one address?  If it's to redirect multiple SMTP addresses to one external address, just create the one contact with multiple addresses.  If you want multiple entries in the address book that will divert externally, you could create mailboxes set to forward to the contact, or distribution groups that the contact is the only member of.
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Author Comment

by:techdrive
ID: 39847246
Chris it can be done just trying to figure out how
http://social.technet.microsoft.com/Forums/en-US/528812d3-3c2a-4c00-ac3b-3f2552b94f5a/different-contact-same-proxy-address?forum=exchangesvradminlegacy

The problem is I have 5 different internal contacts with different aliases and not sure how to do the query based group and the other example is not applicable for my ev

Let me also reword something for clarify purposes. It is the same external contact for different internal aliases.
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Accepted Solution

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chriskelk earned 500 total points
ID: 39858716
Which version of Exchange are you using?  I've tried this on Exchange 2007 and 2013 (so 2010 will be the same), and Exchange only allows an address to be used for the ExternalEmailAddress attribute for a single contact.

I tried creating a couple of test contacts, then tried:

get-mailcontact testcontact* | set-mailcontact -externalemailaddress testaddress@testdomain.com

The first contact set correctly, the second gave the message

The proxy address "SMTP:testaddress@testdomain.com" is already being used by "domainname.local/Users/testcontact1". Please choose
another proxy address.

So I believe that this can't be done.  To achieve having multiple recipients in your address book that will send to the same address, I'd remove your existing contacts and replace them with a single contact, then for each recipient you want visible in the address book, create a distribution group that this contact is the only member of.
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Author Comment

by:techdrive
ID: 39900188
Found a way for this to be done. Create the contact and make that contact with the external smtp address a member of each distribution group. This is how you can use it multiple times.
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Author Comment

by:techdrive
ID: 39900203
I've requested that this question be closed as follows:

Accepted answer: 0 points for techdrive's comment #a39900188

for the following reason:

The reasons given by the other persons were not applicable.
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Expert Comment

by:chriskelk
ID: 39900204
In both of my comments, I suggested making the contact a member of multiple distribution groups in order to achieve what the requester wanted.  The requester has then said that they've used exactly this method in their solution, but said that my reasons are not applicable!
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