Apple (macOS, iOS, iPadOS, etc.)
Your Apple device is configured using a "connection profile". You can download your connection profile by logging on to your mailbox administration interface.
Once you've logged in, you'll find 4 login profiles on the home page. Download the one you wish to use, then open it on your device. It will then be visible at the bottom of the "Privacy and security" section of your device's system settings. All you have to do is activate it by following the suggested steps.