Using New Outlook on Windows for professional communication and productivity
In relation to Exchange Online (option 1) accounts being added to the new version of Outlook.
"This account is not supported in Outlook for Windows due to the license provided by you work or school. Try to login with another account or go to Outlook on the web."
Microsoft, please sort this madness out. As mentioned by others, you can add any other email provider on the planet so why would you limit paying Microsoft users who have exchange accounts.