Publicly signed SHA-1 certificates are now officially dead to Microsoft Internet Explorer 11 and Edge as of yesterday’s released security updates.  Internally self signed legacy certificates should continue to work, but Microsoft strongly urges a migration to SHA-2 or greater as soon as possible.  Take due notice.

https://threatpost.com/microsoft-makes-it-official-cuts-off-sha-1-support-in-ie-edge/125579/