Reference:
Do you love the conversation arrangement introduced in Outlook 2003, but feel like there is something missing? Well there is! By default, the conversation arrangement doesn’t include your contribution to the conversation. With just a few steps, you can configure Outlook to save copies of all outgoing messages in your Inbox to create what I like to call the Ultimate Inbox. Take a look at my Inbox and you’ll see the messages I’ve sent are right alongside incoming messages making the conversations complete. (I use categories extensively too. More on that in a future post.)
