(the images shown here are from version 4.2222.2)
Microsoft Outlook on Android will attempt to use Exchange Active Sync (AES). This configuration has a number of issues from data sovereignty and network performance issues.
When AES is used, your data is pulled out of the country and stored on Microsoft servers. From here, it is fed back to your device. This process introduces performance and reliability issues.
It is for these reasons, we do not recommmend or support using Exchange Active Sync (AES).
Outlook will now offer to setup using Exchange using Exchange Active Sync (AES). This is not recommmended.
Instead, click on the question mark at the top.
Select "Change account provider"
#1 - mail.your.domain.name is an example and not literal. Replace this with your own domain name.