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From: Damian on 22 Apr 2010 13:16
I have just come back form a client site, inherited, where we were
trying to work out why certain email addresses were not working as expected.

Basically they had a user object in AD - user(a)domain.com - with the
primary smtp set as user(a)domain.com with no delivery options set.

However when I examined another user object in the same active directory
I found the identical smtp address listed in their email address list.

How is this possible?

I was under the impression that you would not be allowed to create the
smtp address as it was already in existence.

SBS 2003 BTW.

Any enlightenment very welcome as I am seriously confused by this.

Thanks in advance, Damian.
From: John Oliver, Jr. [MVP] on 22 Apr 2010 13:50
That is correct in your assumptions. If the address was manually added to
the user account in question, AD should have thrown and error not allowing
it to be created. Its very possible this could have been brought over
through a migration but not certain. I suppose if you are inheriting this
situation its hard to say how both SMTP addresses were able to be created in
the same AD. You can remove it safely and everything should be back to
normal.

--
John Oliver, Jr
MCSE, MCT, CCNA
Exchange MVP 2010
Microsoft Certified Partner


"Damian" <damianlynch(a)live.co.uk> wrote in message
news:uKAlF#j4KHA.3880(a)TK2MSFTNGP04.phx.gbl...
> I have just come back form a client site, inherited, where we were trying
> to work out why certain email addresses were not working as expected.
>
> Basically they had a user object in AD - user(a)domain.com - with the
> primary smtp set as user(a)domain.com with no delivery options set.
>
> However when I examined another user object in the same active directory I
> found the identical smtp address listed in their email address list.
>
> How is this possible?
>
> I was under the impression that you would not be allowed to create the
> smtp address as it was already in existence.
>
> SBS 2003 BTW.
>
> Any enlightenment very welcome as I am seriously confused by this.
>
> Thanks in advance, Damian.

From: Rich Matheisen [MVP] on 22 Apr 2010 22:22
On Thu, 22 Apr 2010 18:16:17 +0100, Damian <damianlynch(a)live.co.uk>
wrote:

>I have just come back form a client site, inherited, where we were
>trying to work out why certain email addresses were not working as expected.
>
>Basically they had a user object in AD - user(a)domain.com - with the
>primary smtp set as user(a)domain.com with no delivery options set.
>
>However when I examined another user object in the same active directory
>I found the identical smtp address listed in their email address list.
>
>How is this possible?

You can add the same address to lots of things if you modify the AD
directly (using LDP, LDIFDE, ADSI, etc.). What prevents you from doing
that with, say, the ADUC, is the checking that's done by the software
to prevent that from happening..

>I was under the impression that you would not be allowed to create the
>smtp address as it was already in existence.
>
>SBS 2003 BTW.
>
>Any enlightenment very welcome as I am seriously confused by this.

Find out how the two AD objects were populated with those addresses
and you'll find the culprit.
---
Rich Matheisen
MCSE+I, Exchange MVP
From: Damian on 24 Apr 2010 07:43
On 23/04/2010 03:22, Rich Matheisen [MVP] wrote:
> On Thu, 22 Apr 2010 18:16:17 +0100, Damian<damianlynch(a)live.co.uk>
> wrote:
>
>> I have just come back form a client site, inherited, where we were
>> trying to work out why certain email addresses were not working as expected.
>>
>> Basically they had a user object in AD - user(a)domain.com - with the
>> primary smtp set as user(a)domain.com with no delivery options set.
>>
>> However when I examined another user object in the same active directory
>> I found the identical smtp address listed in their email address list.
>>
>> How is this possible?
>
> You can add the same address to lots of things if you modify the AD
> directly (using LDP, LDIFDE, ADSI, etc.). What prevents you from doing
> that with, say, the ADUC, is the checking that's done by the software
> to prevent that from happening..
>
>> I was under the impression that you would not be allowed to create the
>> smtp address as it was already in existence.
>>
>> SBS 2003 BTW.
>>
>> Any enlightenment very welcome as I am seriously confused by this.
>
> Find out how the two AD objects were populated with those addresses
> and you'll find the culprit.
> ---
> Rich Matheisen
> MCSE+I, Exchange MVP

thanks for the confirmation.
good to know i ma not going mad.
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