We want to create a pop-up warning box that appears whenever someone selects 'Reply to all' in Outlook 2010. Ideally we could edit the vbaproject.otm file on everyone's PC to accomplish this. Editing this file would be a free solution and would also be very easy to deploy. I'd prefer not to have to install anything or need user intervention. I have seen Sperry, Bells and Whistles, and IvaSoft's TuneReplyAll already.