Step 1: Open the mail client
The mail client can be opened by selecting the mail app in the tile section of the start menu or by searching "mail" in the Windows 10 search box.
Step 2: Click "Get Started"
If it is your first time in the app select "Get Started". If you already have an account setup in the application, it will be listed and you click the add account button.
Step 3: Select Advanced Setup
Scroll Down and select Advanced Setup then select "Exchange ActiveSync" as the type of account you'd like to setup.
Step 4: Enter Your Email and Password
You'll then be prompted with a Windows 10 security screen asking to make your PC more secure. Clicking on "Enforce these policies" is required to configure the account.
As long as your credentials are correct and you have a valid internet connection you'll have indication that the account configuration was successful.
Click "Done" and you will be returned to the account list page which should now list your Exchange account (and any previously configured accounts).
Select your account and enjoy.