Email Migration
This PDF has a step by step explanation for setting up your Exchange account https://www.ihmc.us/wp-content/uploads/2018/11/Email-Migration-and-Setup.pdf
If you would like to move your calendars yourself, here is a step by step video https://www.ihmc.us/1/moving_calendars.mov. If you already have your calendars in a program you can skip to about 50 seconds to export them out.