Just wanted to add my voice to wanting outlook sync, especially for calendar. Email seems to work great at the moment, but without my outlook calendar, usefulness is quite limited.
Actually, something I just thought of… I currently show my outlook calendar in my google calendar by subscribing to the .ics link (unfortunately, that calendar doesn’t show up in Legend). But I was wondering if maybe it might be a less big task to allow subscribing to online calendars via .ics links? It would be read-only, sure, but still a lot more useful to be able to see my calendar in Legend.