1 - Open Apple Mail
Open the Apple Mail application.
2 - Microsoft Exchange
On the Apple Mail home page, click "Microsoft Exchange."
3 - Enter your username
Next, enter your username and optionally a description.
Please note that setting up a Split Setup Exchange mailbox is only possible with a username in the following format:
Logging in with your email address is not possible!
Then click "Next."
4 - Sign in with Microsoft
A new window will open, asking if you want to sign in with Microsoft. Click "Sign in."
5 - Enter password
Next, enter your password and click "Next."
6 - Server Settings
Please complete/change the information entered. The following information is required to set up your Hosted Exchange Direct Setup mailbox in Apple Mail for iOS:
Server: at.exchangeserver.online
Domain: none / leave blank
Username: Your username
Description: Optional
Then click "Next".
7 - Conclusion
Select the features you want to use. Then click "Save".
You can now access your emails.
