When adding a new mail go to system preferences in your task bar. Then go to ”Internet Accounts”.
When the new window shows up. Go to the exchange account.
Enter your name and UM email address like the picture underneath (Fill in your own information).
Exchange will ask you to sign in with Microsoft. Confirm that by clicking ”Sign in”.
When the new window pops-up, fill in the rest of the information required.
You will then get a error. ”Unable to verify account name and password”. Fill in the new pop-up window like the example underneath. (Fill in your own information).
Then mark every app you want to use with this exchange account. Click done when completed.