My Samsung Note 5 default calendar app is not displaying my exchange calendar

My Samsung Note 5 default calendar app is not displaying my exchange calendar under the manage calendars setting after the account was added and set to sync calendars.
I have removed the account and re added it several times.
I have removed other accounts that could be interfering (Samsung account, Facebook account etc).
I have restarted the device several times.
I attempted to manually sync the Exchange account.
Nothing I do allows me to see exchange as an option in my calendar app.
I tried to add the Exchange account directly from the calendar app.