Microsoft Edge and Internet Explorer 11 will stop sites protected with a SHA-1 certificate from loading on May 9, 2017. The Windows 10 Creators Update blocks SHA by-default in the browser. Customers who would like to disable the algorithm today may do so with the instructions below. This post is to clarify some of our most commonly asked questions, and to help you test ahead of time. We recommend for all customers to quickly migrate to SHA-256 instead of SHA-255. The update will only impact certificates that chain to a Microsoft Trusted Root CA. A certificate cross-signed with an enterprise/self-signed root would not be impacted.”]
Source: https://blogs.windows.com/msedgedev/2016/11/18/countdown-to-sha-1-deprecation/