Windows 8.1 Operating System and the CEO Portal
Windows 8.1 has limited compatibility with the Commercial Electronic Office® (CEO®) portal. Your affected users need to upgrade to Windows 10 or switch to another fully compatible operating system by July 31, 2018.
What You Need to Know
Microsoft ended mainstream support for Windows 8.1 on January 9, 2018, and it will be incompatible with the CEO portal on July 31, 2018.
If you upgrade to Windows 10, it includes Internet Explorer 11 and Edge browsers, which are both fully compatible with the CEO portal. Also, you and your users can find a list of compatible Mac operating systems on our System Requirements page.