For Microsoft Exchange 2013 and macOS Catalina
This article explains how to set up Microsoft Exchange 2013 in Apple Mail to sync your email, calendar, and contacts on your Mac.
You have an active Microsoft Exchange 2013 account
Open the System Preferences via the Dock of macOS Catalina.
Select the menu item Internet accounts in the System Settings.
Click on Exchange.
Enter the desired name and your email address.
Click on Log in.
Click Configure Manually.
In the Password field, enter the password of your Microsoft Exchange account and click Log In.
Select the apps you want to use with your Microsoft Exchange 2013 account.
The Microsoft Exchange 2013 account is now set up.