I've been a paid calendar snooze user for years, across multiple phone replacements. I recently got a new Google pixel 2, Android 8.0.0, and for the first time ever, in having difficulty.

I have a Gmail account, and two exchange accounts. The Gmail account is working, but I'm not getting CS reminders for the exchange accounts. In the past, I used Gmail and whatever 3rd party mail app came with the phone. All calendaring was done via the built in calendar app. Now, I'm still using the Gmail app, and calendar app, but I'm using the office 365 app. The exchange calendars still appear in both the normal calendar app and office 365, but CS isn't handling reminders for the o365 calendars.

Where does CS get its calendar info from? Is there some way I can check to ensure its seeing the right calendars? Do I need to uninstall office 365?