On February 14, 2017 Microsoft will deprecate the SHA-1 certificates that many TLS-secured websites use. They plan to release an update to the Edge and IE 11 browsers which will display the following when a SHA-1 TLS-secured site is accessed.
To fix this issue, update the certs to SHA256 (SHA-2).
For update information a good place to look is GoDaddy.
Get new third-party certificate: here.
Install the certificate: here.