Did you manually edit one of the configuration files enabling an authenticator method but not provide all the info it needs for that method, and now the configuration script is not able to complete.
If it were me, I would wipe the config files regenerate the default configs and try again from scratch..
Really what it sounds like you are looking for is a default configuration of Exim4 using a Smarthost (exchange) with no local delivery.
OH and btw, Do NOT mark threads as Urgent, Important, etc.. it's only urgent for you, the rest of us are volunteers. Many people better suited than me to answer your question may have skipped it entirely due to the thread topic.
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