I'm looking to build a Raspberry Pi3 based wall calendar that syncs to my companies Office 365 meeting room(s) account and displays the calendar which i can then mount on the wall.

So far i've got Android TV on the Pi, i've got a whole host of different calendar options loaded but a fair few of them (expectedly) don't even load, but there are a few good looking ones i've got running quite well.

My issue is that most calendar apps dont let you sign into the app itself with an account to sync, but they pull from the local android 'accounts/email' area. AndroidTv doesn't have that option built in by default, does anyone know if it's possible to side load that?