I use the aCalendar app to display my caldav calendar and Microsoft calendars as it has a very good interface. For the Microsoft calendars, the Outlook app can pull the calendars and make them available for aCalendar. It works fine.
Am wondering if there is another app instead of Outlook that I can use instead just for the calendars. I wanted to keep the emails outside of this profile. I have looked on Fdroid without success.