I have 2 domains on my single hosted Exchange account in Office 365. The 3 email accounts on one of the domains work fine with Outlook 2013. How do I set up my one email account on the other domain to work with the same Outlook 2013 profile? At the moment I'm using it online only on a Windows 8 desktop and a Windows 8.1 laptop. It works fine and syncs perfectly on my Nokia Lumia 920 Windows Phone 8 phone. It used to work fine on Windows 7 but the upgrade must have messed this up.