Background
Versions of TLS 1.0 or below have known weaknesses and are considered insecure. The industry has been heavily deprecating the use of 1.0 for many years and to be PCI compliant, which all Nationhost services are, requires a minimum of TLS 1.1.
Outlook / Office
Microsoft have previously been slow to update their Office suite with support for TLS greater than v1.0 for versions of Windows earlier than 10.
Whilst there is now support built in to Windows 8.1, there is no support in 8.0 and so all users of 8.0 should upgrade to at least Windows 8.1.
Windows 7 requires updates to be installed in order to provide TLS 1.1 or greater support (including TLS 1.2 which Nationhost requires).
Please see This Microsoft support document for details on how to update Windows 7.
Any problems with this should be directed to your desktop support provider, Nationhost cannot provide advice on operating system configuration or updates.
Other Windows Versions
Nationhost does not support any type of connection from Windows XP.
Windows Vista does not support TLS greater than version 1.0, so cannot connect to Nationhost
