Re: Exchange 2003 POP3 authentication failure (bug?)

On Fri, 6 Jun 2008 00:03:27 +0200, "Massimo" <barone@xxxxxxxxx> wrote:

"Massimo" <barone@xxxxxxxxx> ha scritto nel messaggio
news:eDPw4V1xIHA.4876@xxxxxxxxxxxxxxxxxxxxxxx

A good solution here would be to have a configurable setting in the POP3
service to specify the default authentication domain, just like you can do
in OWA and SMTP; this would work even in multi-domain environments, which
are the only ones where this Exchange behaviour of not recognizing users
by their username actually makes some sense.

By the way, I still can't understand why Exchange have trouble looking up
users when authenticating with the DOMAIN\username format. If a user
authenticates this way, there can't be any possibile doubt on who he is,
even if duplicated usernames exist in multiple domains. So, why can Exchange
look up users (and mailboxes) when logging on with the UPN but not when
using the DOMAIN\username syntax?


The explicit logon is required when logging on using the down-level
format simply because Exch doesnt assume that the mailbox alias
matches the username alias.
UPNs are unique by design, so the server knows there will be never be
a duplicate.

Just a leftover from the NT4 days.





Massimo
.

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