Using Outlook for Android for personal email and calendar management
Spacesnow,
No, I only have two Microsoft accounts that I am syncing Contacts and Calendars, and I'm doing that with the Outlook app. That makes Contacts and Calendars available to any Contact or Calendar app and keeps everything synced. I turned off notifications and I don't bother with the Outlook app except to keep Contacts and Calendars in sync on my phone for those 2 accounts. I am using Edison as a unified inbox for all my Gmail, Outlook, and my Activesync work account. I actually set up a Microsoft account that I have used across all my devices for years that I don't even use for anything else except keeping everything synced (Edge browser, Contacts, Calendars, Settings, Onedrive, Onenote...). I don't do email in there.