Exchange 2010 Contacts

Hello,

We just noticed a issue appear with the way we are using contacts. The way we have the contacts setup now is like this:

Primary SMTP address: name@mydomain.com
Alias: name@outsidedomain.com
External E-mail address: name@outsidedomain.com

This works just fine when one of our users sends to any contact.  The issue comes up when one of our internal users sends to multiple contacts in the same email.  If one of the contacts (contactA) does a reply to all it will try to reply to the other contact(contactB) with the email address name@mydomain.com and this will bounce saying the user is not valid. If we set the primary smtp address to the be external address things seem to work fine.


My question is what is the correct way to setup a contact in exchange 2010?  Should the primary address be the same as the external address?
We have a consultant saying that setting the primary address to an external address is wrong and breaks the way contacts work.  

Please let me know if you need any additional information.
LVL 8
didnthaveanameAsked:
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Jarred PowerNetwork AdministratorCommented:
Mail contacts are designed to be used for external domains.  Therefore the primary SMTP address needs to be the external e-mail address (otherwise exchange trys to route it internally).  The best practice it to have both a mailbox and mail contact for users that need mail routed to an external email account.  Then under mail flow settings for the user you can forward or deliver to both internal and external email addresses.
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didnthaveanameAuthor Commented:
Do you happen to know then if its possible to have a email address policy for contacts that will set the external address as the primary ?
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Jarred PowerNetwork AdministratorCommented:
Well, you could kind of get it to work, but each contact would have to have the same external FQDN. (and also the same naming convention)

It would take the first and last name and append it to the specified domain.

joesmith@example.com, benblack@example.com

 %1d%@example.com

if you have a contact with different external FQDN ie bobdoe@comcast.net, it would get converted to bobdoe@example.com
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didnthaveanameAuthor Commented:
Sadly that is what i thought as well.  
Thank you for the help and confirming my thoughts.
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