with it’s current release of microsoft outlook app for ios and android it is possible to preconfigure via enterprise mobility suite @microsoft
following values are suppoted for android, a step further for android enterprise to get rid of the “almost”
for ios refer to apple’s managed app configuration and it’s key value pairs
within windows10 there are some possiblities to preconfigure an email profile in outlook, even via emm
read more: outlook supporting oauth, ios12 added exchange payload
other mircosoft office apps don’t support these functionality – graph api is the approach, any vendor can integrate with intune to use it as middleware to manage office apps – a powerful api with the intelligence in microsoft’s hands
madereal - enterprise mobility - innovation 