Configuring preferences and options in Outlook.com
Hi Keith. I too am experiencing the exact same thing with my exchange account. Identical error message on my android phone. Did you ever find a solution? Currently I'm doing a work around and using the Outlook app and seperate calendar to be able to view them which is very inconvenient. I too like all my emails/calendae grouped in one place.
Just install the older GMail apk version from September 27:
https://www.apkmirror.com/apk/google-inc/gmail/
Then make sure that automatic updates are disabled for GMail in the Play Store App.