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Why does Exchange 2010 add random characters to the end of my Distribution Group Email addresses?

When I create a distribution group in exchange 2010, it appends random numbers and letters at the end of the SMTP address.  Why won't it just create the email address based on the alias?

Example:

name: test
alias: test

then it creates an email address of "test_13d27c@********.com
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IntersystemsAdmin
Asked:
IntersystemsAdmin
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1 Solution
 
abhijitmdpCommented:
You must run a windows and exchange update on your servers to resolve this issue.
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IntersystemsAdminAuthor Commented:
Which update?
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abhijitmdpCommented:
Run windows update and download and install exchange updates.
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IntersystemsAdminAuthor Commented:
We have run windows update and the situation is the same. Users are created correctly, but distribution group e-mail addresses are created using a combination of the x400 and user name. Of course this can be corrected, but it appears the e-mail address policy, which we have customized, works fine with users, but not with distribution groups. This is only happening when the group is created on exchange 2010, not on exchange 2007. Yes, we are in the midst of a migration.
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abhijitmdpCommented:
The X.400 is no longer used by exchange 2010 and 2007, it was besically for the legacy exchange servers, if there is any X.400 address exist you can eaisly remove them  and update the address policies but after removiing users who will send mails using the X.400 address will not be delivered, those users have to update his/her address book. You can remove these X.400 addresses using shell cmdlets or manually from DL's properties.
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IntersystemsAdminAuthor Commented:
We shouldn't have to remove the X.400 record to resolve this.  The policy we have in place to create the email addresses shouldn't be creating these random strings in the first place.

Here is the policy we have:
SMTP
%g_%s@xxxxxxxxxxxxxxxxxx.com
@xxxxxxxxxxxxxxx.com
%g.%s@xxxxxxxxxxx.com

X400
c=US;a= ;p=xxxxxxxxx;o=Exchange;

as an example, when I create a Distribution group on Exchange 2010 I get these emails
SMTP
ExpertsExchangeTest1b5dc8@xxxxxxxxxxxxxxxxxx.com
_1b5dc8@xxxxxxxxx.com

X400
C=US;A= ;P=xxxxxxxxxxxxxx;O=Exchange;S=ExpertsExchangeTest1b5dc8;

On 2007 I get these emails
SMTP
_20edcc@xxxxxxxxxxxxxx.com
ExpertsExchangeTest@xxxxxxxxxxxxxx.com

X400
C=US;A= ;P=xxxxxxxxxxxxxx;O=Exchange;S=ExpertsExchangeTest;
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IntersystemsAdminAuthor Commented:
To solve this, we created a new mailbox policy specific to distribution groups.
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IntersystemsAdminAuthor Commented:
We tried our solution and it worked.
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