Why is event history cleared after two weeks?

[AC Question]

I need to refer to previous appointments on a regular basis. The appointments are on my desktop outlook emails like forever, but S7 edge only retains two weeks.

 

[tony bag o donuts]

Change the setting in your calendar app on your device.
It does this to prevent additional syncing which uses data and battery life.
When I had a Sammy it was under the calendar sync settings. I believe you could go back 60-90 days.
This is your exchange account and not your gmail account correct?