Mail not syncing

[thatdennis]

I recently updated my Lumia 640 with an insider preview, and DAMN is this UI beautiful. Would love to switch over from Android, but could not due to my Mail and Calendar apps not syncing with my outlook e-mail. Ironically, my g-mail accounts work well enough. Does anyone know why?

On a side note, does anybody know the official release of W10M on th 640?

On a side side note, is the Uber app crap in Win10M?

Thanks