I typically use the desktop version of outlook as opposed to the app/iphone mail for the ability to filter my search results easily. I can search for a topic and then refine my results by sender. On the beta, I did not have the same ease as I do currently. If the search result filtering ability is not remaining the same to what it is now, or something equally as similar, I would have lost one of my main means in going through my old emails. Please do not affect this ability as it is in the current version. Thank you.