‘This account can’t be used to access Outlook.com’ – Connected my outlook and Office365 account through Aliases

I recently connect my outlook and office365 account and on my outlook account made my Office email the primary alias. Now when I attempt to log in to my outlook account the error message 'This account can't be used to access Outlook.com' comes up. I've followed some of the help found in the forum already but nothing seems to work. Any help will be much appreciated.