I have googled this topic to death and there aren't many resources that pertain to this topic:
How can I change the title bar icon XamRibbonWindow so that it's different from the task bar icon?
Hello Spencer,
I am just checking the progress of this issue and was wondering if you managed to achieve your goal or if you need any further assistance on the matter.
Thank you for your post. I have been looking into it and I can suggest you see this forum thread from StackOverflow:
http://stackoverflow.com/questions/10072143/two-different-icons-for-window-title-and-task-bar-wpf
where it is explained how to do so for the MS Window. Since the XamRibbonWindow derives it, the same could be applied there. Also if you have further questions about this matter I can suggest you ask them in the MS forums, since this is related to MS controls and because there you can get an answer from an Microsoft Expert.