Would you like to be able to see the time you replied to or forwarded a message in your message list view? You can, using an Extension form configuration file (*.CFG) that exposes the hidden Extended MAPI property PR_LAST_VERB_EXECUTED, which holds the replied to/forwarded times. The best part is, you don't need to have a clue about what I just said. :) Michal Bednarz of CodeTwo (and a Microsoft Outlook MVP) wrote a 'Last Action' CFG file. It exposes the fields for both the time and action (replied/forwarded).
You can download the Last Action CFG from CodeTwo.com
Installation and usage steps are at: Adding Extended MAPI Fields to Outlook
Published July 27, 2007. Last updated on December 14, 2011.