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Exchange 2010 and outside email group

Posted on 2015-02-23
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Last Modified: 2015-03-23
We need to setup a group on our Exchange 2010 server, so our internal users/groups can reach them from our address book.

How can I do this, if they are outside addresses?

I've created a Distribution Group and manually added the addresses, but we still can't see the name in the OAB. Manually typed in the Group address too, but made no difference, still not delivering mail.
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Question by:Harold
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by:Will Szymkowski
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You can add external contacts (that are in your exchange environment) to a distribution group. Then when you email the distribution group the external users will receive the email.

if you are not seeing this in the GAL it is because you are using OAB (offline address book). This only updates 1 a day otherwise if you specifically specify it to update more frequently.

If you use OWA on Outlook Client with cached mode disabled you should see the group in the GAL.

Will.
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by:Harold
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@Will: "that are in your exchange environment" There external, how do I get them there if there not listed.
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Will Szymkowski earned 500 total points
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You need to individually create Mail Contacts in your Exchange Environment. When you do this you specify the external mail contact address. Once these contacts are in your Exchange environment you can add them to your DL's as well.

Make sure that "require authentication" is removed from the DL's that you use for external contacts to ensure that people from the outside can send to them without failing.

Will.
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by:Harold
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@Will: So I have to create them an account in AD?

"Make sure that "require authentication" is removed from the DL's that you use for external contacts to ensure that people from the outside can send to them without failing. "

1) Where do you set the Require Authentication?

2) "for external contacts to ensure that people from the outside can send to them without failing."  People from the outside? The addresses are external, why would someone send mail through our server to get to the outside address?
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by:Will Szymkowski
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In order to add external email addresses to a DL that is internal you need to create mail contacts within your Exchange environment. Once you have these setup you can then add these contacts to your internal DL's.

Require authentication is configured on the properties of the DL itself.

Will.

Will.
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by:Harold
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@Will: I have to create these outside accounts internal e-mail addresses? Isn't that defeating the purpose, if we need it going to gmail, outlook and other outside mail services?
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by:Will Szymkowski
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Isn't that defeating the purpose, if we need it going to gmail, outlook and other outside mail services?

If you want contacts to be available in the GAL or be able to add them to your Exchange DL's you have to add them to your Exchange environment. You create the External Contacts using their external smtp address. Once they are on your Exchange server, you can open the DL and add those new External Contacts to this list.

You have to have a reference in Exchange in order to add it to a DL.

Will.
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by:Harold
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@Will: ya, did that and still no mail is going to the list. I added them to Exchange and modified the E-mail Address <tab> and set their external addresses as default SMTP, but still nothing. I put setup my gmail account and added myself to the list, so I could make sure I get the mail.

I had just setup another internal DL and it's working fine for those user, just the DL to the external, don't have something right.
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by:Harold
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I create Exchange accounts for these external sales, went to E-mail Addresses, added their external addresses, set to default reply. Added them plus myself to this group, which have our external addresses and I can buy and e-mail. Nothing makes from this group, NOR can you send them an e-mail directly. Never makes it anywhere, with no returns or bounces.
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by:Will Szymkowski
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On the distribution group do you have "Require Authentication" enabled? This setting is enabled by default so if you try unchecking this setting and test it again. I have done this several times using external contacts in DL's with no issues. So i am not sure what is going on with your distribution group.

Will.
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by:Harold
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I do not see anything for "Require Authentication", where is this setting?
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by:Harold
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If you're referring to this, yes I did this.

Go to the distribution list's Properties.
Click on the Mail Flow Settings tab.
Double-click Message Delivery Restrictions.
Uncheck the box "Require that all senders are authenticated."


Does it matter what the group Type, is? Now Security/Global
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by:Harold
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@Will, is this the setting? If so, yes, i removed the check, so should be disabled. Unless you're talking about another area.
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by:Will Szymkowski
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This should not matter. However, when you create distribution groups within Exchange the are set to Universal. Might want to give that a shot.

Not sure why this is not working, as stated this is very straightforward and should work with no issues. if you have in fact created an External Contact within your Exchange environment and added it to this group.

Will.
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by:Harold
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I'll change to Universal, group type Dist, correct. I even added my gmail account to an account I created for me to test. Since adding this account w/my gmail account setup within it, I no longer receive e-mails from within our domain. Even, if I remove it, which I did and still no mail I send to my gmail account makes it and I  get no returns.
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by:Harold
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Couldn't figure out where this "Mail Contact" was, got it now.  Thanks
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