I'm reading Learning Exchange Server 2003 by Boswell, and there's a section in there that mentions that a disabled account in AD cannot receive email and that it will be bounced back. Currently, what usually happens when a person leaves our company is that the account gets disabled, moved to an archive OU, and the email is forwarded on the Exchange General tab to someone else. It appears to have been working all this time, but I'm wondering why the book would say otherwise... We are using a single Exchange 2003 SP2 server.
Under what circumstances would a disabled user account cease to receive email?