1. There does not appear to be a feedback button. I see a "sync", "pin to start" on the left. I see a "move" and "mark unread" to the right. I don't see "feedback" appear anywhere.
2. I don't believe the "feedback" is conversational or interactive communication. In other words, if I submit feedback I'm not going to be able to talk with anyone or hear answers to the questions I submit. We'll all still be in the dark as to why the Mail 8 app requires an MS account to function.
Therefore,I conclude that your suggestion won't work to use the in-app feedback option. I need a valid method to contact someone on the Mail 8 team to get a definitive answer as to why the app functions the way it does. In addition, I'm appalled that the Exchange team themselves don't know why the defacto app on the new flagship OS that MS has launched makes their Exchange product look like utter garbage. The users don't see Exchange, but they do see Mail 8 which immediately turns them off.
Again, since you don't want to talk about this issue in this forum, where is an appropriate place I could post this question that will result in an actual answer being given? Again too, I'm saddened that the Exchange team can't answer this. Everyone at Microsoft is running Windows 8, but nobody can explain why the default mail client behaves in a particular way? Not cool.