We are running Exchange 2007 SP1 and AD 2003.
I have heard that Exchange/AD uses the Alias attribute to route mails internally, not the actual email address.
However - I've created a test accout, mailed it so that it was in my auto-complete, then changed the Alias on it and tried to use the cached entry, and the mail has still been delivered.
I am using Outlook 2007 SP2 in Cached Exchange mode - shouldn't the result be that the mail was not delivered since the cached entry pointed to a different Alias?
Secondly, if I create a mail enabled Contact in my AD (e.g. firstname.lastname@example.org) - I assume routing to that *does* use the email address property, since it's external?