Here are some mailbox setup video tutorials. Advising how to setup email on a specific device can be difficult as there are so many different versions of software with varying screen layouts and options. This is particularly true of different revisions of Outlook. For this reason we always recommend Webmail accessible at https://www.stackmail.com or https://www.outitgoes.com for older mail accounts.

How to set up a 20i mailbox using Outlook Desktop

How to set up a 20i email mailbox on a Mac
How to set up a 20i email mailbox on an iPad or iPhone

How to set up a 20i mailbox on Android

How to set up a 20i mailbox using Thunderbird