"Ralfeus" <ralf***@gmail.com> wrote in message
news:1191831723.039152.109250@k79g2000hse.googlegroups.com...
> Hi, all
> I have met a strange situation. There is a forest with several
> domains. One domain contains a user with mailbox. Couple months later
> a user with mailbox and same SMTP address as first one has was created
> in another domain. I didn't see how it was created and creator can't
> explain what did he do. As far as I understand it's impossible but
> there is a fact - two users in Exchange organization have same SMTP
> address. How is it possible to do and how to make it impossible?
> Thanks
> Mykhaylo
>

On Oct 8, 7:32 pm, "Ed Crowley [MVP]" <cursp...@mvpsnospam.org> wrote:
> It's definitely not impossible.  If you write a script, for example, that
> doesn't check for duplicates, you can easily create duplicate SMTP addresses
> using ADSI.  In addition, I believe (but I haven't tested this) that if you
> open two instances of Active Directory Users and Computers, connect each one
> to a different domain controller, and at the same time add the same address
> to different user objects, the duplicate would not be caught.
> --
> Ed Crowley
> MVP - Exchange
> "Protecting the world from PSTs and brick backups!"
>
> "Ralfeus" <ralf***@gmail.com> wrote in message
>
> news:1191831723.039152.109250@k79g2000hse.googlegroups.com...
>
> > Hi, all
> > I have met a strange situation. There is a forest with several
> > domains. One domain contains a user with mailbox. Couple months later
> > a user with mailbox and same SMTP address as first one has was created
> > in another domain. I didn't see how it was created and creator can't
> > explain what did he do. As far as I understand it's impossible but
> > there is a fact - two users in Exchange organization have same SMTP
> > address. How is it possible to do and how to make it impossible?
> > Thanks
> > Mykhaylo