For Microsoft Outlook 2016 for Mac
This article explains how to set up a new Microsoft Exchange 2013 email account in Outlook 2016 on your Mac.
Launch Outlook 2016 for Mac.
Go to Tools > Accounts in the menu bar.
Click Add Email Account.
Enter your email address.
The following window will appear: Sorry! We could not find a match.
In the DOMAIN\username or email field, type your email address.
In the Password field, type the password you assigned when you set up Microsoft Exchange 2013.
In the Server (optional) field, enter the following: exchange.ionos.com
Click Add account.
You will be prompted to authorize Autodiscover to set up Outlook on your behalf. Click Allow and enable the Always use my response for this server option.